Grows sparkling crystal cluster up to 4" (10 cm) in diameter on multi-colour LED base! Growing SPACE AGE CRYSTALS ® is easy, fun and educational. Uses patented crystal growing solutions below 131 °F / 55 ° C (no boiling hot water needed). Discover the laws of nature which create crystals deep inside the Earth. Perform experiments like astronauts, who grow ultra-pure crystals in the weightlessness of space. Assemble a multi-colour LED base. Learn about anodes and cathodes of LEDs. Make a small electrical circuit and connect your LEDs to the base. Dissolve the crystal growing powder in warm water. Place growth container onto multi-colour LED base and watch SPACE AGE CRYSTALS ® glow and grow, right before your eyes. Crystals and crystal growing powder are biodegradable . A fascinating experience for children and adults. Contents: Multi-color LED base, crystal-growing powder, crystal-growing container, lid, stirring rod, 48-page Space Age Crystals booklet, instructions. USA: Ages 12+ WARNING: This kit contains chemicals which may be harmful if misused. Read cautions on individual containers carefully. Not to be used by children except under adult supervisions. Weight 0.89 lb Dimensions 8.7" height x 6.5" width x 2.4" depth