5 buttons with more than 40 sound and light effects, just press the button to make sound, light and music! Light-up Big Button: With "red" and "blue" lights, it's fun to "want to press". Soft button: Press the number button and the big button will light up. It also makes different dialogues! Baby is amazed. Hard button: The switch is so realistic, it looks just like the real thing! Convex buttons: different tactile sensations to stimulate tactile development. Slender button: you can press it by gripping it! This product requires 2 AAA batteries (Not included)