The Ham-Ham Express

Laura and her class are going hiking on a field trip to the mountains! The Ham-Hams would like to tag along too, but having missed the bus, they figure it would take them about 3 days of ticky-tickying to get up the mountain. However, Panda introduces his brand new hand-made solution: a Ham-Ham locomotive! All board the new train excitedly. The journey however, is full of difficulties.