We turned Jaxon's closet into an "Elevator."
My buttons are lame because I'm totally out of craft supplies (would be cool to make them out of colorful construction paper) but the boys still had fun with it.
They were making beeping noises when pressing the buttons. One time Brant came out of the elevator and pretended he was giving a tour of "his firehouse" to his brothers. He gave his guests a snack and everything.
At bedtime, I told Jaxon to pick out some books to read and he came back with the elevator buttons. He wanted to count them, talk about all of the circles, etc. It was cute.