"Honking horns! Chuggington is a special place where train engines have come to life. Ride along on the humorous adventures of Koko, Wilson and Brewster, three young trainees learning to ride the rails of life to become full-fledged chuggers!" -- iTunes Store
Download for Free!
Brewster's Little Helper: Zephie admires the ‘big’ chuggers, and wants to pull freight just like them. Brewster is dismissive when she offers to help him - you have to be big and strong to do the things he does. Jet Pack Wilson: The trainees are thrilled to be spending the day training with Action Chugger. He puts them through some intensive stamina exercises, but Wilson just wants to get to the bit where they use jetpacks and fly.
the fine print: Downloads posted on the Free iTunes Downloads blog are usually free for ~1 week. After that, you'll have to pay for them.