I’m a little bit late on this thinking as it’s May and Easter was weeks ago, but I’m surprised that no one is making Easter Peeps as sponges for the sponge ball/bunny trick. The make total sense and the marshmallow has a sponge like visual texture.
If you didn’t want to do a traditional “in their hands” style vanish and productions, you could use them more like multiplying bananas. They’re topical, visual and really wouldn’t take any additional skill to learn if you already do the bananas.
They really wouldn’t be hard to make a mold of, assuming the ingredients in the Peeps don’t have a bad reaction with the mold material. For me this is a deep back burner project, maybe I’ll get to it by next easter…