He finally figured out the Sit 'n' Spin today. After a few days of wanting to play with the switch on the bottom (to turn it to game mode, which I hate -- it's a Simon Says thing), he has spent two days wanting me to do what it says to do, by hand, without him on it. I find this pretty boring. Today, he decided it would be okay for him to sit on it while I did what the game directed -- which is quite a bit more fun, but did get dull after a while. When I quit, he kept going. That was a lot of fun for him, and marginally more fun to watch.
We're talking the Mr. Potato Head toys away for a while because he persists in shoving a lot of the parts way back in his mouth. And then going down the slide. And then throwing a fit when we take them out of his mouth/away. We're sick of it so they are going into hiding until he's through with this round of teething.