This is s simple toy truck with rotating wheels.
You need 3 metal axes 2mm x 45mm. After printing cut off the support and try to assemble the axes. Maybe you have to drill the wheels with a 1.8mm thin spiral drill. This belongs to the accuracy of your printer.
It Takes about 18h on a layer height if 0.15mm. Clean the surface before printing for a better adhesion! I used a brim to get a better adhesion. Support only from build plate.