3 years & up. Penguins are excellent swimmers, which is a necessary trait for them to have in the aquatic regions where they live. They have a thick layer of insulating feathers which keeps them warm in the coldest of waters allowing them to stay submerged when hunting for a lengthy amount of time. Set includes ten penguins from the following species: Adelie, Chinstrap, Emperor, Galapagos, Gentoo, Humboldt, and Rockhopper. Penguins range from 1 1/4" to 3 3/4" tall. Non-toxic and BPA free.