If you can find crescent rolls, the pop-n-fresh sort, that the dough is in a can and you pop it open and lay them out to bake, you can make a yummy one that kids love. Just take the crescent roll dough and roll a hot dog up inside it, then pop in the oven until the dough is baked through. Paige loves her with cheese added inside.
Piggies in a blanket! That was one of my gran's specialities, but she made her own bread dough for them.
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Ideas compliments of MIL & DH's childhood memories:
Bangers & mash hedgehogs -- you make a hedgehog on the plate using a mound of mash for the body, cut up the sausages & stick upright into the mound of mash = the hedgehog's spines. Use green peas for eyes & peas around for the grass. We made these for our friends' children & they *loved* it!
Fish finger trains -- the fish fingers are the carriages of the train, use sliced carrots for the wheels, little clouds of mash for the steam. You could be creative with other veg to decorate them further, I suppose.
DH's mum also used to make him milk-jelly bunnies using some kind of pink/red jelly (jello) and with bunny molds (which we now own!). She would also do green jelly cubes for grass that the bunny sat in. If you could get mini-marshmallows (or maybe other candy?) & do tails, eyes, or whatever.