Home life is much less predictable than the school day. At school, Max knows his routine and can communicate and perform quite successfully within that structure. But summer at home? He doesn't have the knowledge base for predicting or communicating about the variety of things we do. He's often just left in the dark, not fully comprehending where we are going, or what is expected of him, so even if he can provide some input, it doesn't really count.
What's more, transitions have always been hard for Max. If he's "off", he will clam up, rub his seams, tell me "shh!". He regresses, resorting back to sensory input and total dependence, and tries to shut down. When he's "in a good place"? Well, magic can happen.
The tango! website has a really neat emulator you can try from your home computer that gives an illustration of how the device is set up, and how to navigate through the levels. If you would like to learn more, go to http://www.blink-twice.com/ to browse around or click here to go directly to the emulator page. It's pretty darn slick!