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$7.19, Aug 12 3:06 am $5.72, Aug 12 3:06 am $7.81, Aug 14 4:51 am $5.52, Aug 14 4:51 am $5.42, Aug 15 3:36 am $4.95, Aug 15 3:36 am $5.32, Aug 16 - Aug 18 $4.37, Aug 17 5:07 am $5.32, Aug 16 - Aug 18 $4.24, Aug 18 3:36 am $5.42, Aug 19 - Sep 5 $3.91, Aug 20 10:43 am $5.42, Aug 19 - Sep 5 $3.83, Aug 21 10:34 am $5.42, Aug 19 - Sep 5 $3.64, Aug 23 1:52 pm $5.42, Aug 19 - Sep 5 $4.00, Aug 24 - Aug 30 $7.07, Aug 31 12:21 pm $5.42, Aug 19 - Sep 5 $6.89, Sep 1 3:56 pm $5.42, Aug 19 - Sep 5 $5.42, Aug 19 - Sep 5 $4.00, Sep 2 - Sep 17 $5.32, Sep 6 - Sep 7 $4.00, Sep 2 - Sep 17 $5.22, Sep 8 - Sep 11 $4.00, Sep 2 - Sep 17 $5.02, Sep 12 - Sep 15 $4.00, Sep 2 - Sep 17 $4.72, Sep 17 8:31 pm $4.00, Sep 2 - Sep 17 $4.52, Sep 19 - Sep 22 $0.88, Sep 19 - Sep 22 $4.22, Sep 24 12:54 pm $0.78, Sep 24 12:54 pm $4.02, Sep 26 - Sep 28 $0.66, Sep 26 2:59 pm $4.02, Sep 26 - Sep 28 $0.58, Sep 28 3:22 pm $3.82, Sep 30 4:22 pm $0.52, Sep 30 - Oct 24 $3.62, Oct 2 7:26 pm $0.52, Sep 30 - Oct 24 $3.52, Oct 4 9:32 pm $0.52, Sep 30 - Oct 24 $3.42, Oct 6 10:54 pm $0.52, Sep 30 - Oct 24 $3.22, Oct 9 1:02 am $0.52, Sep 30 - Oct 24 $3.12, Oct 11 - Oct 15 $0.52, Sep 30 - Oct 24 $2.82, Oct 17 - Oct 19 $0.52, Sep 30 - Oct 24 $2.62, Oct 22 1:09 am $0.52, Sep 30 - Oct 24 $2.42, Oct 24 7:36 am $0.52, Sep 30 - Oct 24 $2.22, Oct 30 4:40 am $2.22, Oct 30 4:40 am $1.99, Nov 4 - Nov 29 $0.52, Nov 4 5:26 pm $1.99, Nov 4 - Nov 29 $0.40, Nov 11 5:24 am $1.99, Nov 4 - Nov 29 $0.15, Nov 16 5:59 am $1.99, Nov 4 - Nov 29 $0.01, Nov 19 - Nov 21 $1.99, Nov 4 - Nov 29 $1.90, Nov 23 10:24 am $1.99, Nov 4 - Nov 29 $1.56, Nov 25 2:41 pm $1.99, Nov 4 - Nov 29 $1.21, Nov 27 11:28 am $1.99, Nov 4 - Nov 29 $0.91, Nov 29 9:56 am $10.72, Dec 1 8:47 am $1.84, Dec 1 8:47 am $13.89, Dec 3 7:23 am $4.00, Dec 3 7:23 am $13.61, Dec 5 - Dec 11 $7.38, Dec 5 5:11 am $13.61, Dec 5 - Dec 11 $0.51, Dec 7 3:03 am $13.61, Dec 5 - Dec 11 $3.99, Dec 9 4:31 am $13.61, Dec 5 - Dec 11 $3.94, Dec 11 7:30 am $12.56, Dec 13 6:51 am $3.82, Dec 13 6:51 am $15.56, Dec 15 - Dec 17 $3.71, Dec 15 4:58 am $15.56, Dec 15 - Dec 17 $3.59, Dec 17 4:26 am $15.92, Dec 21 - Dec 24 $3.25, Dec 21 11:45 pm $15.92, Dec 21 - Dec 24 $4.00, Dec 23 - Dec 29 $18.03, Dec 25 - Dec 27 $4.00, Dec 23 - Dec 29 $16.52, Dec 29 2:52 am $4.00, Dec 23 - Dec 29 $17.89, Dec 30 7:19 pm $3.94, Dec 30 7:19 pm $16.52, Jan 1 9:37 am $3.84, Jan 1 9:37 am $15.29, Jan 10 - Jan 20 $3.98, Jan 12 4:37 am $15.29, Jan 10 - Jan 20 $3.89, Jan 13 5:00 pm $15.29, Jan 10 - Jan 20 $3.79, Jan 15 9:36 am $15.29, Jan 10 - Jan 20 $3.69, Jan 17 2:36 am $15.29, Jan 10 - Jan 20 $3.59, Jan 18 6:32 pm $15.29, Jan 10 - Jan 20 $3.49, Jan 20 9:02 am $17.98, Jan 22 - Mar 9 $3.39, Jan 22 1:03 am $17.98, Jan 22 - Mar 9 $3.99, Jan 23 - Feb 15 $17.98, Jan 22 - Mar 9 $5.48, Feb 17 3:18 pm $17.98, Jan 22 - Mar 9 $4.97, Feb 19 12:20 pm $17.98, Jan 22 - Mar 9 $4.35, Feb 21 9:57 am $17.98, Jan 22 - Mar 9 $3.90, Feb 23 7:36 am $17.98, Jan 22 - Mar 9 $3.99, Feb 25 - Mar 7 $17.98, Jan 22 - Mar 9 $3.98, Mar 9 1:03 pm $18.39, Mar 11 - Mar 23 $3.86, Mar 11 - Mar 28 $88.16, Mar 26 3:38 am $3.86, Mar 11 - Mar 28 $83.86, Mar 28 11:11 am $3.86, Mar 11 - Mar 28 $80.88, Mar 30 8:26 pm $3.91, Mar 30 8:26 pm $77.48, Apr 2 9:26 am $3.95, Apr 2 - Apr 7 $75.70, Apr 4 11:37 pm $3.95, Apr 2 - Apr 7 $73.96, Apr 7 3:04 pm $3.95, Apr 2 - Apr 7 $141.18, Apr 10 7:25 am $3.79, Apr 10 7:25 am $130.66, Apr 13 4:03 am $3.85, Apr 13 - Apr 18 $119.70, Apr 16 12:05 am $3.85, Apr 13 - Apr 18 $112.58, Apr 18 12:38 pm $3.85, Apr 13 - Apr 18 $109.64, Apr 21 5:31 am $3.86, Apr 21 - Apr 24 $102.56, Apr 24 12:37 am $3.86, Apr 21 - Apr 24 $97.80, Apr 25 11:31 am $3.28, Apr 25 11:31 am $91.20, Apr 28 11:51 am $3.86, Apr 28 - Jun 14 $131.78, May 1 - May 2 $3.86, Apr 28 - Jun 14 $129.22, May 5 - May 12 $3.86, Apr 28 - Jun 14 $142.48, May 15 6:41 pm $3.86, Apr 28 - Jun 14 $130.62, May 20 1:08 am $3.86, Apr 28 - Jun 14 $122.61, May 24 3:55 am $3.86, Apr 28 - Jun 14 $128.88, May 28 11:37 am $3.86, Apr 28 - Jun 14 $133.00, Jun 2 2:39 am $3.86, Apr 28 - Jun 14 $110.24, Jun 6 5:47 pm $3.86, Apr 28 - Jun 14 $99.12, Jun 10 9:19 pm $3.86, Apr 28 - Jun 14 $96.52, Jun 14 5:03 pm $3.86, Apr 28 - Jun 14 $128.10, Jun 18 11:16 am $3.85, Jun 18 11:16 am $112.74, Jun 22 5:07 am $3.66, Jun 22 5:07 am $112.62, Jun 26 12:44 am $3.48, Jun 26 12:44 am $111.90, Jun 30 2:01 am $3.26, Jun 30 2:01 am $111.24, Jul 4 7:28 am $3.00, Jul 4 7:28 am $110.96, Jul 9 7:46 pm $2.67, Jul 9 7:46 pm $97.08, Jul 14 12:51 am $2.44, Jul 14 12:51 am $83.29, Jul 17 4:45 pm $2.22, Jul 17 4:45 pm $83.14, Jul 21 8:17 am $1.59, Jul 21 8:17 am $113.78, Jul 24 - Jul 28 $1.35, Jul 24 10:18 pm $113.78, Jul 24 - Jul 28 $1.04, Jul 28 11:15 am $106.22, Aug 1 1:39 am $0.74, Aug 1 1:39 am $93.22, Aug 4 3:48 pm $0.45, Aug 4 3:48 pm $93.22, Aug 4 3:48 pm $0.18, Aug 8 9:17 am $93.22, Aug 4 3:48 pm $0.01, Aug 12 - Aug 21 $135.08, Aug 25 8:22 am $1.48, Aug 25 8:22 am $135.08, Aug 25 8:22 am $1.49, Aug 29 3:01 am $96.89, Sep 1 7:59 pm $1.50, Sep 1 7:59 pm $135.08, Sep 5 - Sep 13 $4.40, Sep 5 5:10 pm $135.08, Sep 5 - Sep 13 $3.24, Sep 9 3:20 pm $135.08, Sep 5 - Sep 13 $6.43, Sep 13 12:19 pm $148.46, Sep 17 9:28 am $8.03, Sep 17 9:28 am $144.54, Sep 21 6:56 am $8.98, Sep 21 6:56 am $132.43, Sep 25 5:18 am $15.48, Sep 25 - Oct 3 $121.96, Sep 29 3:13 am $15.48, Sep 25 - Oct 3 $115.78, Oct 3 4:43 am $15.48, Sep 25 - Oct 3 $105.22, Oct 7 7:09 am $8.99, Oct 7 7:09 am $98.56, Oct 11 10:06 am $8.98, Oct 11 - Oct 23 $92.98, Oct 15 8:34 am $8.98, Oct 11 - Oct 23 $88.22, Oct 19 4:33 am $8.98, Oct 11 - Oct 23 $84.04, Oct 23 2:11 am $8.98, Oct 11 - Oct 23 $80.36, Oct 26 11:33 pm $15.48, Oct 26 11:33 pm $78.38, Oct 30 10:42 pm $16.34, Oct 30 - Nov 16 $75.02, Nov 3 10:50 pm $16.34, Oct 30 - Nov 16 $78.36, Nov 8 1:35 am $16.34, Oct 30 - Nov 16 $80.61, Nov 12 4:10 am $16.34, Oct 30 - Nov 16 $76.65, Nov 16 9:42 am $16.34, Oct 30 - Nov 16 $80.63, Nov 20 6:48 pm $16.19, Nov 20 6:48 pm $74.58, Nov 25 4:45 am $16.34, Nov 25 - Nov 29 $72.52, Nov 29 9:24 pm $16.34, Nov 25 - Nov 29 $70.22, Dec 4 7:15 pm $10.39, Dec 4 7:15 pm $66.78, Dec 9 10:51 pm $10.37, Dec 9 10:51 pm $63.88, Dec 14 11:24 pm $10.86, Dec 14 11:24 pm $61.10, Dec 19 11:44 pm $10.14, Dec 19 11:44 pm $22.79, Dec 24 6:28 pm $9.93, Dec 24 - Jan 3 $57.50, Dec 29 7:50 pm $9.93, Dec 24 - Jan 3 $56.66, Jan 3 2:41 pm $9.93, Dec 24 - Jan 3 $75.58, Jan 8 12:17 pm $9.59, Jan 8 12:17 pm $75.90, Jan 13 10:00 am $9.67, Jan 13 10:00 am $76.87, Jan 18 10:39 am $9.89, Jan 18 10:39 am $74.34, Jan 20 11:38 pm $18.47, Jan 20 11:38 pm $182.61, Jan 25 - Jan 30 $74.34, Jan 20 11:38 pm $74.34, Jan 20 11:38 pm $69.99, Feb 5 - Feb 20 $124.14, Feb 26 9:04 am $19.24, Feb 26 9:04 am $144.06, Mar 8 7:27 am $32.30, Mar 8 7:27 am $143.94, Mar 19 - Mar 31 $32.27, Mar 19 - Mar 31 164,901 2,395,919
2,734,375
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Price Details
3rd Party New
Last Seen
$143.94 Mar 31, '16
Highest
$148.46 Sep 17, '15
Lowest
$1.99 Nov 4, '14
Average
$144.00 (30d avg)
Added
Aug 12, 2014
3rd Party Used
Last Seen
$32.27 Mar 31, '16
Highest
$182.61 Jan 25, '16
Lowest
$0.01 Aug 12, '15
Average
$32.28 (30d avg)
Added
Aug 12, 2014
Sales Rank
30 day average: 2,199,724 1,667,454
Product Description
Young researchers will dive into the fantastic world of science with this authoritative one-stop reference that's packed with all the information kids want to explore. Grouped into five clear sectionsNumbers, Energy and Matter, Materials, Living Things, and Spacethis encyclopedia includes activities, key vocabulary, web links, and tons of fascinating trivia that will keep kids coming back for study and for pleasure. This is a trusty reference for the home or classroom.
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