Revealing mistake: After Kenan gets his head stuck in the bars it becomes obvious on multiple occasions while Kenan is moving around that the "bar" on his right is fairly flexible, presumably made out of rubber for the benefit of the actor.
Kenan & Kel (1996)
1 mistake in Fenced In
Starring: Kenan Thompson, Ken Foree, Dan Frischman, Kel Mitchell, Teal Marchande, Vanessa Baden
Kenan: Who loves orange soda?
Kel Kimble: K-K-Kel loves orange soda.
Kenan: Is it true? Is it truuuue?
Kel Kimble: Mmmhhmmm! I do, I do, I do-oooh.
Question: How come Roger won't let Kyra help with her Social Studies project?
Answer: He's simply enjoying doing it himself. Especially since he likely believes he can do it better than she can.