Emma and Liam were trying to do some stacking.. the problem became though that the tower was taller then they could reach. They asked me how were they going to get up there? I said I wasn't sure but when I can't reach something in my cupboards I often use a stool or a chair (and I left it at that). It didn't take them long to figure out how to make them selves taller. I will be the first to say that i'm okay with standing on chairs in my classroom. When your vertically challenged you have to problem solve.. They problem solved together and took turns piling the pieces. :)