The POOF-Slinky - Scientific Explorer Hydro Super Sand, 0SA518TL lets you build sand sculptures under water! This complete set contains blue, orange and pink Hydro Sand, clear plastic water tank, small sieve, sculpting tools and easy instructions. Scientific Explorer is the industry leader in fun, educational and activity-based science kits loved by both parents and children. The POOF-Slinky - Scientific Explorer Hydro Super Sand, 0SA518TL is recommended for children age 6 and up. POOF-Slinky, Inc. is the maker of POOF, Slinky, Ideal and Scientific Explorer Brands. We manufacture POOF foam balls and the world famous Slinky right here in the USA and our list of products keeps growing. Our company has been in business for over 65-years serving customers around the globe. Our product lines offer new exciting play with the highly successful Sno-Toys line, Fuzzoodles activity kits, as well as timeless classics, such as the Original Slinky, Ideal table-top games, wood construction sets and over 400 other products. Visit Alex-brands for more information on Alex Brands and our best-selling line of educational and entertaining products for kids.