Blue cardboard, green cardboard, glue, scissors
Steps:
1. Fold two rectangular cartons out of cardboard and stick them together. The effect is shown below.
2. Cut out the dark blue window on the cardboard and stick it in front of the truck. The effect is shown below.
3. Cut out two small square cardboard for car lights, which can be the same color as the window. The effect is shown below.
4. Finally, cut out four circles with black cardboard and stick them on the truck as tires. The lovely truck model is completed, and the effect is as follows.