An umbrella is an obvious word for the letter U, and perhaps not the easiest to model out of playdough. What other beginning letter words can the kids think of? It's a tricky one!
Alphabet begin with the letter U playdough mat - Log in or Become a Member to download
A zip begins with the letter z - but what else? Get the kids to brainstorm some "z" words and then model them out of playdough. I feel a playdough zoo coming on ...