Yes, go ahead and quilt them. Not bad - 3 quilt tops for $2 and a piece from your stash. If you have any concerns about headless teddies maybe next time cut that focus fabric wider so there are whole teddies (or whatever). Just a thought.
Kids have great imaginations, given half a chance so you can bet they'll make a game out of finding the part that go together. Well done twinkie.