We are visiting Washington DC with our two children ages 10 and 8 and want to do a shuttle tour the first morning we are there. Tourmobile is $20/person, Old Town Trolley is $28 and the DC Party Shuttle is $60. What are the main differences between the Tourmobile and the Old Town Trolley? Why is the Trolley more expensive? Is the DC Party Shuttle worth the extra money? Which tour bus do you recommend? Thank you!