Tokyo Sesame Place had several coin operated character rides.
The vehicles were made by Amutec & Fun2Learn.
These were the same vehicles that could be found in shopping malls around the world. At Tokyo Sesame Place they cost 100 yen.
Image from kozaru98.fc2web.com
Image from blogs.yahoo.co.jp
Image from pop2.air-nifty.com
Here are clearer photos of similar vehicles:
Oscar the Grouch Trash Can Car:
Image from Flickr
Ernie and Bert's Sing-A-Long Car:
Image from Reddit
Cookie Monster's Munch Truck:
Image from Picssr
Big Bird and Elmo's The Big Bird Express:
Image from Picsbud