“We don’t have TV and wife keeps computers and videos to a bare minimum…” Good for you!
I also think crafts is a great idea. Its not too early to buy a craft kit for the sukkah. My nephews spent an entire summer doing a sukkah craft kit. The real big ones can be kinda costly but they take very long to complete and the kids feel like a million when it’s done and it can hang in the sukkah.