Here’s a great keepsake for your kids! It’s free, fun, educational, and functional. Find a decent map of whatever city you happen to be visiting and give your son or daughter a highlighter and a pen. At each destination, highlight the route that you’ve just completed, mark and annotate where you are and what you see. Want to make a really cool map? You’ll have to be willing to walk a long way! Keep the maps from various cities as a reminder of where you traveled, what you saw, and what your kids enjoyed most.