There was something about him not being able to seesaw by himself, then they were playing with play doh at school and he made a duck. Then he played on the seesaw with the playdoh duck even though his real duck friend wanted to play. He also did this with tennis, then destroyed his playdoh duck and cried until his real friend made him another one, at which point he fucked off to play with the playdoh one again.
The lesson here is that Timmy is a dick and would rather be with a playdoh duck that doesn’t love him than his real duck friend that does and is willing to do nice things for him instead of making him expend all the effort.
Or I’m reading too much into it, whatevs.