Walk forward until you reach some tracks. Follow the tracks and turn left to reach a gate. Stand at the gate until Kissy Missy appears. This toy will open the gate for you and then will disappear. Continue heading forward.
The next sequence is fairly simple. All you are doing is moving a cart along the track. To do this simply use your Green Hand to charge the different ports so you can move further down the hallways along the tracks. As you progress you will encounter levers to pull. These open gates along the track. Keep pulling levers, opening gates, and moving the cart. About halfway you will encounter the Blue VHS Tape (4) out in the open.
Bring the cart to the end of the track and push it down to make a path through the boards. Walk down the tracks and turn right at the bottom. Go through the door and drop down through the hole in the floor there. Head back to the Game Station hub.