Smithsonian - Magic Rocks

MCNN52381

$19.99 
SKU: MCNN52381

Watch the colorful crystals grow in the aquarium! Simply place the rocks at the bottom of the tank and add the solution. Within 2 hours, the rocks will grow up to 4 inches. (Don't forget to decorate the tank with the stickers and outer space background first!) 

Ages 8+ ADULT SUPERVISION REQUIRED.

Includes: 
1 space background print, 1 sticker sheet, 1 pkg metallic salts, 2 pkg. sodium silicate, 1 8.5 x 2 x 5.5 inch aquarium, and detailed instructions.

SORRY, SHIPS TO U.S. ONLY.

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