I think Oscar wants to be like Billy when he grows up.
A little while ago, Billy led me to the Closet of Toys and particularly requested a long fuzzy monkey tail teaser. He ran up the cat tower after it once, but Oscar was lurking around the base of the tower and Billy seemed to lose interest. So I shooed Oscar out and played with Billy with the door closed for a little while.
But the fun part came after Billy was (apparently) done. I let Oscar chase the teaser while Billy was retrieving his traditional treats from the puzzle box. Only Oscar didn't seem quite sure what to do with it. So Billy stepped in and went another few rounds, this time with Oscar watching with big wide eyes from a safe and respectful distance.
I told Billy he was being a great role model for the kid and gave him extra kitty treats.