The first time they met, the fat baby was one of the children who had his dummy taken off him, like everyone else. Maggie , him and some of the other children try and get them back. The second time they met , they were in the ungifted area. When she tried to make some friends and paint something, but all the colors were quickly taken. Then she saw the fat baby, drinking some craft materials.
While Gerald was chasing Maggie, the fat baby was seen again, sitting on the train.
In Playdate with Destiny, The Fat Baby is seen going down a slide and nearly colliding with Maggie.