Kids will love these unique growing animals that emerge from a tree stump. Just put the tree stump in a container, cover with water and after 12 to 24 hours, the critter will begin to emerge as the water is absorbed! After the tree stump is entirely broken, the animal will continue to expand for another 24 to 48 hours. The stump measures approximately 2.25 inches high and 2.5 inches in diameter at the base. Fox or owl chosen at random. Age 5 and up.