The Toysmith Hatchin Grow Butterfly is a fun and educational toy that allows kids to witness the magical process of a butterfly's growth. Simply submerge the 2.75" butterfly egg in cold water and wait patiently. Within 12-24 hours, a beautiful butterfly will emerge from the shell and start fluttering around. It's a delightful surprise to watch the butterfly reach its full size in just 1-2 days. After it dries, the butterfly will shrink back to its original size, but you can make it grow again by soaking it in water. This toy provides endless entertainment and teaches children about the wonders of nature.