I M BONES the Springing Spirit

Looks like magic- but it's SCIENCE!

ATTENTION TEACHERS!
Not only is this a fun puzzle, but it's a great way to learn about a scientific principle!

This little pocket puzzle has been on and off the market for many years.
But now it's BACK- and we've got it for you!

This is a clever puzzler in a POCKET size!
Carry it with you in a jacket pocket and be ready to have fun with your friends at a moment's notice!

The idea is this:
You have a tiny white skeleton named I.M. Bones.
Get it? "I am bones". Funny stuff!
You explain that he is known as the Springing Spirit because he loves to hop out of his coffin.
You place I M BONES into the coffin, and he seems to be comfortably resting.
You take him out, and hand him to your friend.
When your friend tries to put him in the coffin, he SPRINGS out!
Try as hard as he might, your friend will simply not be able to get I M BONES to stay in the coffin!
But of course YOU can- because you will know the secret!
They will definitely be fascinated by this puzzle!

WARNING: CHOKING HAZARD. Do not put the pieces in your mouth. Not suitable for children under 5 years of age.