This kit teaches you how to grow gypsum crystals on the back of your very own hedgehog figurine! Crystals only take one day to grow. Projects like these help to inspire a passion for scientific learning and exploration. Includes crystal powder, a growing container, a stirring stick, a gypsum base, a hedgehog figurine measuring 3-1/4 x 2 x 1-1/2", and a detailed instruction booklet. Colors vary. Ages 10 and up.