'The Wheels on the Bus' is ubiquitous as a children's song (though I just checked the DT and did not find it), but a friend often starts it up at his gigs in pubs and it invariably goes over big with the college-through-retiree gang.
Some other verses:
The babies on the bus go wah-wah-wah
The mommies on the bus go shh-shh-shh
The wipers on the bus go swish-swish-swish (I like the hand movements to this one)
And I think he originated
The driver on the bus goes 'Move on back!'

And Rosa Parks said 'Not for me!'

Now the people on the bus sit where they want,
Left or right, back or front,
Now the people on the bus sit where they want,
All through the town.
Actually, that is the school kid version (he does lots of schools too). In the pub it is usually
Rosa Parks said 'Kiss my ass!' which gets applause every time.
For our friends across the pond: Rosa Parks (1915-2005) is called the 'Mother of the Civil Rights Movement' in the U.S. She was involved with youth and civil rights causes through her adult life. In the 1950's 'coloreds' were routinely made to sit in the back of public buses. On December 1, 1955, Ms. Parks was riding a public bus in Montgomery, Alabama, and declined to give up her seat to a white male.
Social history in a preschoolers' song performed in a pub. Who knew.