Of all of the training pants on the market, Spelling goes for Huggies Pull-Ups Learning Designs ($18). "His favorite is the Learning Designs Pull-Ups. We also have the Night-Time Pull-Ups and the Cool-Alert Pull-Ups. He likes the Learning Designs because they have the Cars on them and he is obsessed with the Disney Pixar movie Cars. Somehow that’s very fascinating to him that he has cars on his Pull-Ups."