Forget the stepsisters, Cruella and Malifecent, this needs to be the next “villain was actually the hero story”
The activities of the villainous boy in Toy Story are awesome: blowing up his toys with fireworks, reassembling them, combining them with random hardware
Andy is stuck in his mind, playing pretend in his room
Sid is mastering the toolbox and the flame, rearranging the universe