This is a hard to find 2005 Fisher Price Sesame Street Singing Pop-Up Poppin Pals Toy 

This toy features Elmo, Cookie, Oscar & Ernie.

Each character pops out when their corresponding button is manipulated and sings a part of their signature song. 

Elmo - Elmo's World

Cookie - C is for Cookie

Ernie - Rubber Ducky

Oscar - I Love Trash 

Requires 2 AA Batteries (not included) 

This is a classic toy for a reason - kids love it!!