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  • Gizmos & Gadgets: Creating Science Contraptions That Work (& Knowing Why) (Williamson Kids Can!)

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Buy from Amazon $11.66$0.01 $12.50 $10.00 $7.50 $5.00 $2.50 Aug Dec Apr Aug Dec Apr Aug Dec Apr Aug 2013 2014 2015 2016 $11.65, Apr 4 - Jul 2$11.07, May 9 - Aug 9$11.65, Jul 9 - Aug 25$11.07, Sep 9 - Sep 29$11.07, Sep 9 - Sep 29$5.54, May 3 - May 21$0.76, May 3 - May 4$11.07, Sep 9 - Sep 29$5.54, May 3 - May 21$0.75, May 5 - May 8$11.07, Sep 9 - Sep 29$5.54, May 3 - May 21$0.73, May 9 6:42 pm$11.07, Sep 9 - Sep 29$5.54, May 3 - May 21$0.65, May 12 5:32 pm$11.07, Sep 9 - Sep 29$5.54, May 3 - May 21$0.53, May 15 5:14 pm$11.07, Sep 9 - Sep 29$5.54, May 3 - May 21$0.41, May 18 4:05 am$11.07, Sep 9 - Sep 29$5.54, May 3 - May 21$0.22, May 21 3:20 am$11.07, Sep 9 - Sep 29$7.75, May 23 - May 24$0.09, May 24 8:27 am$11.07, Sep 9 - Sep 29$7.73, May 25 - May 26$0.09, May 26 11:12 pm$11.07, Sep 9 - Sep 29$7.71, May 30 - May 31$0.10, May 27 - May 31$11.07, Sep 9 - Sep 29$7.69, Jun 1 8:33 pm$0.18, May 31 - Jun 4$11.07, Sep 9 - Sep 29$7.74, Jun 5 3:07 am$0.77, Jun 5 3:07 am$11.07, Sep 9 - Sep 29$7.71, Jun 6 - Jun 8$0.88, Jun 7 - Jun 9$11.07, Sep 9 - Sep 29$7.75, Jun 10 11:29 am$0.93, Jun 10 11:29 am$11.07, Sep 9 - Sep 29$7.68, Jun 13 11:06 am$0.92, Jun 13 - Jun 14$11.07, Sep 9 - Sep 29$7.73, Jun 16 4:53 pm$0.95, Jun 15 - Jun 25$11.07, Sep 9 - Sep 29$7.67, Jun 18 11:44 pm$0.95, Jun 15 - Jun 25$11.07, Sep 9 - Sep 29$7.69, Jun 20 - Jun 23$0.95, Jun 15 - Jun 25$11.07, Sep 9 - Sep 29$7.55, Jun 25 12:41 am$0.95, Jun 15 - Jun 25$11.07, Sep 9 - Sep 29$7.25, Jun 28 5:31 am$0.99, Jun 25 - Jul 1$11.07, Sep 9 - Sep 29$7.15, Jun 30 1:49 pm$0.99, Jun 25 - Jul 1$11.07, Sep 9 - Sep 29$6.95, Jul 4 2:24 am$0.98, Jul 2 - Jul 7$11.07, Sep 9 - Sep 29$6.85, Jul 6 9:22 am$0.98, Jul 2 - Jul 7$11.07, Sep 9 - Sep 29$6.71, Jul 9 12:27 am$0.97, Jul 9 12:27 am$11.07, Sep 9 - Sep 29$6.55, Jul 12 2:49 pm$0.95, Jul 11 - Jul 20$11.07, Sep 9 - Sep 29$6.43, Jul 15 6:44 am$0.95, Jul 11 - Jul 20$11.07, Sep 9 - Sep 29$6.28, Jul 18 12:07 am$0.95, Jul 11 - Jul 20$11.07, Sep 9 - Sep 29$7.61, Jul 21 5:47 am$0.99, Jul 21 - Jul 22$11.07, Sep 9 - Sep 29$7.72, Jul 23 12:06 pm$0.98, Jul 23 12:06 pm$11.07, Sep 9 - Sep 29$6.98, Jul 25 - Jul 27$0.88, Jul 26 10:51 pm$11.07, Sep 9 - Sep 29$6.77, Jul 29 5:37 pm$0.81, Jul 29 5:37 pm$11.07, Sep 9 - Sep 29$6.15, Aug 1 1:16 pm$0.75, Aug 1 - Aug 2$11.07, Sep 9 - Sep 29$6.30, Aug 4 9:37 am$0.74, Aug 3 - Aug 6$11.07, Sep 9 - Sep 29$5.97, Aug 7 7:41 am$0.99, Aug 7 - Aug 9$11.07, Sep 9 - Sep 29$6.00, Aug 9 - Aug 10$0.74, Aug 10 10:39 am$11.07, Sep 9 - Sep 29$5.95, Aug 13 7:50 am$0.98, Aug 12 - Aug 13$11.07, Sep 9 - Sep 29$6.03, Aug 16 3:13 am$0.98, Aug 15 - Aug 16$11.07, Sep 9 - Sep 29$6.31, Aug 17 - Aug 26$0.95, Aug 18 6:26 am$11.07, Sep 9 - Sep 29$6.31, Aug 17 - Aug 26$0.89, Aug 21 - Aug 22$11.07, Sep 9 - Sep 29$6.31, Aug 17 - Aug 26$0.65, Aug 24 3:39 pm$11.07, Sep 9 - Sep 29$6.99, Aug 27 - Sep 2$0.62, Aug 27 - Aug 30$11.07, Sep 9 - Sep 29$6.99, Aug 27 - Sep 2$0.55, Sep 2 3:37 pm$11.07, Sep 9 - Sep 29$7.77, Sep 3 - Oct 9$0.76, Sep 5 - Sep 6$11.07, Sep 9 - Sep 29$7.77, Sep 3 - Oct 9$0.59, Sep 7 9:38 am$11.07, Sep 9 - Sep 29$7.77, Sep 3 - Oct 9$0.41, Sep 11 12:55 am$11.07, Sep 9 - Sep 29$7.77, Sep 3 - Oct 9$0.10, Sep 13 9:59 am$11.07, Sep 9 - Sep 29$7.77, Sep 3 - Oct 9$0.01, Sep 19 - Sep 23$11.07, Sep 9 - Sep 29$7.77, Sep 3 - Oct 9$0.25, Sep 25 5:21 am$11.07, Sep 9 - Sep 29$7.77, Sep 3 - Oct 9$0.99, Oct 1 1:07 pm$11.07, Sep 9 - Sep 29$7.77, Sep 3 - Oct 9$0.92, Oct 2 3:54 pm$11.07, Sep 9 - Sep 29$7.77, Sep 3 - Oct 9$3.22, Oct 6 9:24 pm$11.66, Oct 9 - Oct 12$7.99, Oct 10 - Oct 22$0.99, Oct 10 - Oct 12$11.07, Oct 13 - Nov 16$7.99, Oct 10 - Oct 22$0.98, Oct 15 - Oct 20$11.07, Oct 13 - Nov 16$7.99, Oct 10 - Oct 22$0.92, Oct 21 10:02 am$11.07, Oct 13 - Nov 16$9.98, Oct 23 - Nov 9$0.40, Oct 23 6:40 pm$11.07, Oct 13 - Nov 16$9.98, Oct 23 - Nov 9$0.22, Oct 25 - Oct 31$11.07, Oct 13 - Nov 16$9.98, Oct 23 - Nov 9$0.18, Nov 2 - Nov 5$11.07, Oct 13 - Nov 16$9.98, Oct 23 - Nov 9$0.10, Nov 9 5:46 am$11.07, Oct 13 - Nov 16$8.59, Nov 16 - Dec 13$0.78, Nov 16 5:50 pm$11.08, Nov 18 - Nov 20$8.59, Nov 16 - Dec 13$0.98, Nov 19 8:54 pm$10.96, Nov 22 - Nov 30$8.59, Nov 16 - Dec 13$1.38, Nov 22 1:30 am$10.96, Nov 22 - Nov 30$8.59, Nov 16 - Dec 13$1.26, Nov 25 7:34 am$10.96, Nov 22 - Nov 30$8.59, Nov 16 - Dec 13$1.03, Nov 28 7:06 am$10.90, Dec 1 - Dec 4$8.59, Nov 16 - Dec 13$0.78, Dec 1 7:13 am$10.90, Dec 1 - Dec 4$8.59, Nov 16 - Dec 13$0.01, Dec 4 - Dec 17$10.84, Dec 5 - Dec 8$8.59, Nov 16 - Dec 13$0.01, Dec 4 - Dec 17$10.78, Dec 9 - Dec 17$8.59, Nov 16 - Dec 13$0.01, Dec 4 - Dec 17$10.78, Dec 9 - Dec 17$7.93, Dec 15 - Dec 18$0.01, Dec 4 - Dec 17$10.72, Dec 18 - Dec 21$7.93, Dec 15 - Dec 18$3.24, Dec 18 7:07 pm$10.72, Dec 18 - Dec 21$8.59, Dec 21 1:06 pm$2.94, Dec 21 1:06 pm$10.60, Dec 29 - Jan 5$8.50, Dec 29 - Jan 4$1.45, Dec 29 7:00 pm$10.60, Dec 29 - Jan 5$8.50, Dec 29 - Jan 4$0.88, Jan 2 4:20 am$10.60, Dec 29 - Jan 5$7.94, Jan 5 - Jan 10$0.43, Jan 5 2:36 am$10.54, Jan 6 - Jan 10$7.94, Jan 5 - Jan 10$0.05, Jan 8 12:24 am$10.54, Jan 6 - Jan 10$7.93, Jan 10 - Jan 19$0.01, Jan 8 - Apr 24$10.75, Jan 11 - Jan 14$7.93, Jan 10 - Jan 19$0.01, Jan 8 - Apr 24$10.96, Jan 15 - Jan 21$7.93, Jan 10 - Jan 19$0.01, Jan 8 - Apr 24$10.90, Jan 22 - Jan 30$7.92, Jan 19 - Jan 22$0.01, Jan 8 - Apr 24$10.90, Jan 22 - Jan 30$7.91, Jan 23 - Jan 24$0.01, Jan 8 - Apr 24$10.90, Jan 22 - Jan 30$7.90, Jan 25 - Jan 27$0.01, Jan 8 - Apr 24$10.90, Jan 22 - Jan 30$7.85, Jan 30 - Jan 31$0.01, Jan 8 - Apr 24$10.84, Jan 31 - Feb 4$7.84, Feb 2 7:16 pm$0.01, Jan 8 - Apr 24$10.78, Feb 5 - Feb 8$7.81, Feb 5 11:13 am$0.01, Jan 8 - Apr 24$10.78, Feb 5 - Feb 8$7.79, Feb 7 - Feb 8$0.01, Jan 8 - Apr 24$10.72, Feb 9 - Feb 17$7.76, Feb 11 - Feb 13$0.01, Jan 8 - Apr 24$10.72, Feb 9 - Feb 17$7.75, Feb 15 - Feb 17$0.01, Jan 8 - Apr 24$10.66, Feb 19 - Feb 22$7.73, Feb 19 12:55 pm$0.01, Jan 8 - Apr 24$10.66, Feb 19 - Feb 22$7.70, Feb 22 11:56 am$0.01, Jan 8 - Apr 24$10.60, Feb 23 - Feb 28$7.68, Feb 24 - Feb 25$0.01, Jan 8 - Apr 24$10.60, Feb 23 - Feb 28$7.67, Feb 26 - Feb 28$0.01, Jan 8 - Apr 24$10.54, Mar 1 - Mar 9$7.66, Mar 1 - Mar 7$0.01, Jan 8 - Apr 24$10.54, Mar 1 - Mar 9$7.34, Mar 9 3:51 am$0.01, Jan 8 - Apr 24$10.48, Mar 10 - Mar 17$7.25, Mar 12 3:27 pm$0.01, Jan 8 - Apr 24$10.48, Mar 10 - Mar 17$7.18, Mar 15 12:43 am$0.01, Jan 8 - Apr 24$10.48, Mar 10 - Mar 17$7.09, Mar 17 9:27 pm$0.01, Jan 8 - Apr 24$10.42, Mar 18 - Mar 22$7.02, Mar 20 4:50 am$0.01, Jan 8 - Apr 24$10.36, Mar 23 - Mar 27$6.90, Mar 23 6:12 pm$0.01, Jan 8 - Apr 24$10.36, Mar 23 - Mar 27$6.82, Mar 26 2:17 am$0.01, Jan 8 - Apr 24$10.25, Mar 28 - Apr 5$7.75, Mar 29 4:19 pm$0.01, Jan 8 - Apr 24$10.25, Mar 28 - Apr 5$6.24, Apr 1 - Apr 5$0.01, Jan 8 - Apr 24$10.14, Apr 6 - Apr 10$6.00, Apr 6 11:26 am$0.01, Jan 8 - Apr 24$10.14, Apr 6 - Apr 10$5.00, Apr 10 - Apr 12$0.01, Jan 8 - Apr 24$10.03, Apr 12 - Apr 19$4.95, Apr 13 12:48 pm$0.01, Jan 8 - Apr 24$10.03, Apr 12 - Apr 19$4.40, Apr 16 9:47 am$0.01, Jan 8 - Apr 24$10.03, Apr 12 - Apr 19$4.32, Apr 19 1:53 am$0.01, Jan 8 - Apr 24$9.93, Apr 20 - Apr 24$4.00, Apr 20 - Apr 21$0.01, Jan 8 - Apr 24$9.93, Apr 20 - Apr 24$3.82, Apr 24 2:27 pm$0.01, Jan 8 - Apr 24$9.83, Apr 26 - Apr 27$3.51, Apr 27 6:11 pm$0.01, Apr 26 - May 2$9.73, Apr 29 - May 6$3.24, Apr 30 4:54 pm$0.01, Apr 26 - May 2$9.73, Apr 29 - May 6$3.09, May 3 12:09 pm$2.62, May 3 12:09 pm$9.73, Apr 29 - May 6$2.87, May 6 6:04 am$2.87, May 6 6:04 am$9.63, May 7 - May 11$2.80, May 7 - May 10$2.40, May 7 11:10 pm$9.63, May 7 - May 11$8.02, May 11 - May 15$2.22, May 11 8:28 pm$9.53, May 13 - May 15$8.02, May 11 - May 15$2.15, May 15 4:00 am$9.43, May 16 - May 25$7.95, May 16 - May 27$2.07, May 16 11:48 pm$9.43, May 16 - May 25$7.95, May 16 - May 27$2.08, May 19 - May 21$9.43, May 16 - May 25$7.95, May 16 - May 27$2.07, May 23 - May 30$9.46, May 27 - May 30$7.95, May 16 - May 27$2.07, May 23 - May 30$9.49, Jun 1 - Jun 8$7.73, May 30 - Jun 3$1.54, Jun 1 11:07 am$9.49, Jun 1 - Jun 8$7.73, May 30 - Jun 3$0.01, Jun 3 - Jul 4$9.49, Jun 1 - Jun 8$7.75, Jun 6 - Jun 20$0.01, Jun 3 - Jul 4$9.52, Jun 10 - Jun 12$7.75, Jun 6 - Jun 20$0.01, Jun 3 - Jul 4$9.55, Jun 14 - Jun 16$7.75, Jun 6 - Jun 20$0.01, Jun 3 - Jul 4$9.45, Jun 18 - Jun 26$7.75, Jun 6 - Jun 20$0.01, Jun 3 - Jul 4$9.45, Jun 18 - Jun 26$7.73, Jun 24 - Jun 30$0.01, Jun 3 - Jul 4$9.35, Jun 28 - Jul 21$7.73, Jun 24 - Jun 30$0.01, Jun 3 - Jul 4$9.35, Jun 28 - Jul 21$7.75, Jul 2 - Jul 21$0.01, Jun 3 - Jul 4$9.35, Jun 28 - Jul 21$7.75, Jul 2 - Jul 21$0.45, Jul 6 4:04 pm$9.35, Jun 28 - Jul 21$7.75, Jul 2 - Jul 21$0.47, Jul 9 2:06 pm$9.35, Jun 28 - Jul 21$7.75, Jul 2 - Jul 21$0.48, Jul 12 - Jul 14$9.35, Jun 28 - Jul 21$7.75, Jul 2 - Jul 21$0.50, Jul 16 5:11 am$9.35, Jun 28 - Jul 21$7.75, Jul 2 - Jul 21$1.85, Jul 19 10:03 pm$9.53, Jul 23 - Jul 27$7.49, Jul 23 - Jul 30$1.89, Jul 23 1:58 pm$9.53, Jul 23 - Jul 27$7.49, Jul 23 - Jul 30$1.96, Jul 25 9:54 am$9.38, Jul 28 - Jul 30$7.49, Jul 23 - Jul 30$1.91, Jul 27 - Jul 28$9.38, Jul 28 - Jul 30$7.49, Jul 23 - Jul 30$3.44, Jul 30 7:34 pm$9.41, Aug 1 - Aug 9$7.47, Aug 1 - Aug 3$3.38, Aug 3 11:17 am$9.41, Aug 1 - Aug 9$7.49, Aug 5 - Aug 26$3.18, Aug 7 4:34 am$9.41, Aug 1 - Aug 9$7.49, Aug 5 - Aug 26$2.96, Aug 9 2:40 am$9.44, Aug 11 - Aug 18$7.49, Aug 5 - Aug 26$2.37, Aug 13 12:17 am$9.44, Aug 11 - Aug 18$7.49, Aug 5 - Aug 26$0.01, Aug 14 - Apr 7$9.47, Aug 20 - Sep 3$7.49, Aug 5 - Aug 26$0.01, Aug 14 - Apr 7$9.47, Aug 20 - Sep 3$5.07, Aug 28 - Sep 14$0.01, Aug 14 - Apr 7$9.50, Sep 5 - Sep 14$5.07, Aug 28 - Sep 14$0.01, Aug 14 - Apr 7$9.53, Sep 16 - Sep 24$7.49, Sep 16 - Sep 26$0.01, Aug 14 - Apr 7$9.72, Sep 26 - Oct 2$7.49, Sep 16 - Sep 26$0.01, Aug 14 - Apr 7$9.72, Sep 26 - Oct 2$7.50, Sep 28 - Oct 27$0.01, Aug 14 - Apr 7$9.62, Oct 4 - Oct 7$7.50, Sep 28 - Oct 27$0.01, Aug 14 - Apr 7$9.65, Oct 9 - Oct 17$7.50, Sep 28 - Oct 27$0.01, Aug 14 - Apr 7$9.68, Oct 19 - Oct 23$7.50, Sep 28 - Oct 27$0.01, Aug 14 - Apr 7$9.71, Oct 27 1:34 am$7.50, Sep 28 - Oct 27$0.01, Aug 14 - Apr 7$9.74, Oct 29 - Nov 4$4.75, Oct 29 - Nov 2$0.01, Aug 14 - Apr 7$9.74, Oct 29 - Nov 4$7.50, Nov 4 - Dec 5$0.01, Aug 14 - Apr 7$9.77, Nov 6 - Nov 14$7.50, Nov 4 - Dec 5$0.01, Aug 14 - Apr 7$9.80, Nov 16 - Nov 19$7.50, Nov 4 - Dec 5$0.01, Aug 14 - Apr 7$9.83, Nov 21 - Nov 28$7.50, Nov 4 - Dec 5$0.01, Aug 14 - Apr 7$9.86, Nov 30 - Dec 2$7.50, Nov 4 - Dec 5$0.01, Aug 14 - Apr 7$9.89, Dec 5 - Dec 10$7.50, Nov 4 - Dec 5$0.01, Aug 14 - Apr 7$9.89, Dec 5 - Dec 10$5.87, Dec 7 10:29 pm$0.01, Aug 14 - Apr 7$9.89, Dec 5 - Dec 10$7.50, Dec 10 12:40 pm$0.01, Aug 14 - Apr 7$9.92, Dec 13 - Dec 20$4.49, Dec 13 - Jan 2$0.01, Aug 14 - Apr 7$9.95, Dec 23 5:59 am$4.49, Dec 13 - Jan 2$0.01, Aug 14 - Apr 7$9.98, Dec 26 - Jan 2$4.49, Dec 13 - Jan 2$0.01, Aug 14 - Apr 7$10.00, Jan 4 - Jan 14$4.23, Jan 7 - Jan 17$0.01, Aug 14 - Apr 7$10.02, Jan 17 - Jan 24$4.23, Jan 7 - Jan 17$0.01, Aug 14 - Apr 7$10.02, Jan 17 - Jan 24$4.20, Jan 19 - Jan 22$0.01, Aug 14 - Apr 7$10.04, Jan 27 - Feb 4$4.17, Jan 27 1:33 pm$0.01, Aug 14 - Apr 7$10.04, Jan 27 - Feb 4$4.16, Feb 1 12:23 pm$0.01, Aug 14 - Apr 7$10.04, Jan 27 - Feb 4$0.01, Aug 14 - Apr 7$0.01, Feb 4 - Feb 6$10.06, Feb 6 4:56 pm$0.01, Aug 14 - Apr 7$0.01, Feb 4 - Feb 6$10.08, Feb 11 - Feb 25$4.17, Feb 11 - Mar 3$0.01, Aug 14 - Apr 7$10.10, Feb 28 - Mar 9$4.17, Feb 11 - Mar 3$0.01, Aug 14 - Apr 7$10.10, Feb 28 - Mar 9$3.99, Mar 9 - Mar 21$0.01, Aug 14 - Apr 7$10.12, Mar 15 7:55 am$3.99, Mar 9 - Mar 21$0.01, Aug 14 - Apr 7$10.14, Mar 21 5:57 am$3.99, Mar 9 - Mar 21$0.01, Aug 14 - Apr 7$10.16, Mar 27 - Apr 7$4.17, Mar 27 - Apr 2$0.01, Aug 14 - Apr 7$10.16, Mar 27 - Apr 7$4.15, Apr 7 6:48 pm$0.01, Aug 14 - Apr 7 27,702372,169 312,500 234,375 156,250 78,125 0 Oct Dec Feb Apr Jun Aug Oct Dec Feb Apr Jun 2015 2016

Price Details

New

Latest $10.16 2 days ago
Highest $11.66 Oct 9, '14
Lowest $9.35 Jun 28, '15
Average $10.14 (30d avg)
$10.08 (90d avg)
$9.95 (180d avg)
$9.75 (365d avg)
$10.64 (Lifetime average)
Added Apr 4, 2013

3rd Party New

Latest $4.15 2 days ago
Highest $9.98 Oct 23, '14
Lowest $0.01 Feb 4, '16
Average $4.06 (30d avg)
$3.79 (90d avg)
$5.08 (180d avg)
$5.90 (365d avg)
$6.72 (Lifetime average)
Added Apr 4, 2013

3rd Party Used

Latest $0.01 2 days ago
Highest $3.44 Jul 30, '15
Lowest $0.01 Aug 14, '15
Average $0.01 (30d avg)
$0.01 (90d avg)
$0.01 (180d avg)
$0.40 (365d avg)
$0.48 (Lifetime average)
Added Apr 4, 2013

Sales Rank

30 day average: 138,557
90 day average: 138,730

Product Description

Gear up to discover science by constructing weird, wacky contraptions. With this guide, children can start building, questioning, creating, and inventing--all the while learning fun physics principles and good science practices. 150+ illustrations.

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