Tickle-Me Elmo

Tickle-Me Elmos were toys designed by Darth Elmo. This was pretty obvious, as they looked just like them

Tickle-Me Elmos were adorable and lovable, but they held a nasty secret....

Whenever a Tickle-me Elmo was tickled, they would transform into a mecha of mass destruction, which was capable of destroying aplanet.

Obviously, this was what Darth Elmo intended. They were mass-produced by Sesame Street in order to assist them in their planet destruction.

Fortunately, they left the market following Elmo's death, as Sesame Street stopped producing them after it was disbanded.