In order to create the effect of the front face of the car, it is necessary to cut the upper part of the carton with scissors to make an arc effect, and then stick it with transparent glue.
(Figure 2) This is a picture of the underbody. In order to make the wheel rotate, a slot made of cardboard was added.
(Figure 3) This is the rear of the car, and it is very effective to use the "money string" on the couplet as the taillight.
If there is nothing suitable, it is not bad to find some bottle caps and paint them as taillights.
(Figure 4) The headlights of the car are also decorations on couplets. It's a flower-shaped cardboard with springs and the word "big" on it. When the car moves, the two headlights on it will vibrate, which is very fun.