I have a pup who isn't fully vaccinated yet, so I'm going through the same thing. We're doing a lot of mental games... new tricks, refining commands, foundations for obedience and agility, crate games, and lots of bully sticks/raw marrow bones. XD
Teach him something new! My border collie learned how to hold different items in his mouth when we were cooped up (snowed in) for 3 days straight.
Danielle, owner of...
Fraggle Rock Collars
Fraggle Vom Richcreek CGC CA
Red Dog's Reconnaissance Man CGC
General Patton Vom Winter Storm