Our family (parents and kids ages 12, 10 and 10) decided to rent bikes so we could tour at our pace without a group. Reasonable rentals rates by the hour or a flat fee for the day. About 30 minutes into the trip, one of the bikes had a brake line to stop working- I called and Mike immediately met us at the Washington Monument with a replacement bike— fantastic service! It started raining at one point, and we discovered plastic rain ponchos had been placed in the front bag of the bikes. Would highly recommend this as an option to see DC.