This monster is adorable and funny!! It sings, and it's little arms, mouth, and feet move too! Takes 3 AA batteries, not included.

There is a tiny screw that holds the battery cover on.  It takes a smaller Phillips head screwdriver for that. I will put that tiny screw on a piece of tape to the back.  I personally find those screws annoying to take on and off, and the cover stays fine without it.