Listen to the hourglass, clock, sundial and split-flap radio sing a song about the four doors.
Fix the bridge in prehistoric times by adding the missing piece.
Go on a dinosaur's back and rub his itchy spot.
Help fix Woodward's broken wheel in the medieval ages.
Help the train using an oil can in the old west and earn your first junior conductor pay.
Turn the conveyor belt around and travel further into the future.
