These homemade Monsters Inc. costumes have been done before, but never this well!

Time, effort and love plus paper mache (and a lot of it), a big yoga ball, and some well mixed green paint = Mike Wazowski.

Time, effort and love plus lots of furry blue fabric, a plastic bag stuffed tail, an old bike helmet (plus some chicken wire, paper mache, blue fur and polystyrene balls)= Sulley