FREE: Road Trip Printable Activities for Kids - I just looked through these, and there are some great, really simple ideas in here! A lot are more above a three year old's ability, but there's some that are definitely doable right now.
I need to do this for my next trip! Wish I would have started a while ago!!!--I like number 5, but in a blank notebook (with envelopes on each right side page). Make notes on what we did each day on left hand page & collect stubs, receipts, etc for the day in the envelope on the right hand page. Use this to put together the scrapbook when we're home | Henry Happened
5 DIY Journals for the World Traveler | HelloNatural.co