Magic Hedgehog

Grow an ocean blue crystal backed hedgehog in just 24 hours. Explore chemistry while growing real gypsum crystals in this complete kit. Enclosed instructions are easy to follow with premeasured, high quality ingredients. Inspire a passion for science, exploration and experimentation while having fun. Each unique hedgehog is 3-1/4" x 2" x 1-1/2" before crystals grow. Ages 10+.