 When Sulley is about to say goodbye to Boo, Boo is trying to get him  to play. She hands him a Jessie doll from _Toy Story 2 (1999)_ (qv)  as well as Nemo The Clownfish from _Finding Nemo (2003)_ (qv). The  yellow ball with the red star on the floor is the ball from the  Pixar animation, _Luxo Jr. (1986)_ (qv).