All toys are from Mattel's Jurassic World series. ① Baby Indominus Rex 23cm ② Biting! Spinosaurus 55cm ③ Damage! T-Rex II 43cm ④ Jurassic World Super Action! Indominus Rex 61cm ④ requires batteries, but the battery cover is easily detached (see photo 6). Also, I don't have any batteries at home right now, so I haven't been able to confirm its operation. Thank you for your understanding. This is a set of 4. All are used items that children have played with. Please purchase only if you understand that these are used items.