1. How to install? The buckle connects the two tracks. 2. Vehicle Elevator Put the elevator in the track and enjoy the pleasure of the elevator.Matters Needing Attention: When installing the elevator, aim the elevator at the groove of the bracket on both sides, so that the car won't keep falling from the slide. If it is not aligned with the groove of the bracket, the elevator will keep falling. 3. Construction car toys come in different themes and functions in these games. Including Race Track, helicopter, bulldozer, mixer car, elevator, excavator etc. 4. Parent-child Interactive Garage Toy Set For the health of children, this will be a good choice. They can learn knowledge while playing with adults and enhance the relationship between parents and children.