My wife and I put this together. We did exactly what the instructions called for. You have to wait up to 1 hour for the tape to adhere to the wall. After that its pretty straightforward. Not all the cars will work with this set as you want. The sports car or flat roof models will. The set comes with a race car. You will need batteries as well. Its important to note that the charger will not work unless the back clip is attached to the unit. The instructions states this . I would recommend this set but please be sure to read every step and you will be happy