You and your parents decided to visit chica's party world, and inside, you saw several kids running around and playing. There we're some animatronics playing with them, but one in specific was a white bunny, he is supposedly a "Bunny in a Hat" reference

Tophat: He was very small, but still slightly tall than the kids cheering for him "Okay, listen up! Wanna see a trick? Watch!" He suddenly jumped inside a ventilation, after a few seconds, he landed behind them "BOO!" All the kids screamed, but quickly laughed and cheers for him "Hehe, kids are the best!"