I just love random ideas I can throw together in the name of fun. I'm posting this one because whenever we drive and there is a bridge or walkway or anything overhead, M.E. yells, "DUCK!" In small amounts it is too funny. In large amounts it's totally irritating!
How to play:
Show your child photos of bridges and tunnels. Talk about what they are used for, how they are different, where you've seen them, etc.
Now make your body a bridge and let your child climb over you.
Make your body a tunnel and let your child crawl through.
Repeat using chairs, blankets, ropes, etc.