Blu is doing an amazing job with his building project. I imagine he would be upset if you tried to stop him from building. Ralph is not nearly so industrious; he just likes to arrange and rearrange the thin dowels I give him to build with. If I put in more of them than he wants, he'll push some out onto the floor. After he arranges a few dowels the way he wants them, he'll squawk for me to come and take them apart so he can start over.