... Customized sounds and design are welcome3. Suitable for children's sound book or toys4.Standard sounds:music, animals,vehicles,peope,etc ... buttons: membrane Batteries: 3A x 3pcs Customized sizes, sound and printings are welcome. Sound: music, animals, vehicles, people, and more, with high ... studyingFor music teaching and learning, entertainmentFor the blind people learning Electric sound box for toys