The Lottery - S2-E3
Revealing mistake: The pink container in Kel's bags is very obviously empty by the way he handles it. (00:13:25)
The Lottery - S2-E3
Revealing mistake: The goldfish Kel grabs is very obviously a fake. (00:18:50)
The Lottery - S2-E3
Revealing mistake: When Kenan hits Chris in the mouth with the apple, you can tell it was placed in his mouth because he managed to bite the apple, and take a chunk of it out. Normally an apple like that would smash your teeth.
Answer: He's simply enjoying doing it himself. Especially since he likely believes he can do it better than she can.