This picture is an accumulation of two ideas where the pose and diaper being stretched like that is from the Warner Brothers animated film Storks while the mechanical hands here are actually from an idea of "what would happen if Trolley ever babysat"
they both came together in this picture where he is getting Margaret into her new diaper and dress while spoiling her with her bottle, treats, and an assortment of toys to play with. Aw Trolley, you know what babies want <3
