What to Call a Sound Button in a Children's Book That Plays Mixed Animal Noises — Explanation for an 8-year-old

Short answer: You can call it a "sound button" or an "animal sound button."

Step-by-step explanation for an 8-year-old:

1. What it is: It's a small button stuck into a picture book that you press to hear noises — in this case, lots of animal sounds mixed together.
2. How it works (simple): Inside the book there's a tiny player (sometimes called a sound module or sound chip) that holds the recorded noises. When you press the button it plays the sounds.
3. Other names people use:
   • press-to-play button
   • sound module or sound chip (more grown-up words)
   • audio button
4. Fun name ideas for a mixed-animal button:
   • Animal Sound Button
   • Zoo Chorus Button
   • Barnyard Mix Button
   • Animal Chorus Button
   • Mix-and-Listen Button
5. How to tell someone about it: Say something like, "Press the animal sound button to hear a bunch of animals!"

Pick the name that sounds the most fun — for a child, "Animal Sound Button" or "Zoo Chorus Button" works great!