Mummies Alive! (1997) 1x23

Scarab turns himself into a kid with a purple backpack and a purple baseball hat that he wears backwards. Heka hides in his backpack. Meanwhile, the Mummies are acting as chaperones for a Community Center field trip to tour the Acme Bakery. Scarab casts a spell on the dough and it turns into an oversized dough-boy.