I'd like to see more little toys and gadgets and gizmos to fiddle with, similar to the arcade machine, but handheld. One thing I was thinking was a little game console, like a Game Boy or something similar.
Mainly as something to pass the time when going outside is less preferable/not an option.
But in short, more things to mess with.
Good stuff thus far, clearly a lot of time and work has gone into it, so I can't wait to see what else is added.