Help!

[Ponyup]

My mom wants to know what something is called & for the life of me I can't remember.

Do you remember when you were school & you make this thing out of paper that had numbers on it & you would open & close it based on the number you picked & then open it & it would say something inside. I can't remember. I'm gonna try & see if I can remember how to make.

Thanks in advance.