My son received this as a first birthday present.  I am not "mechanically inclined", so this took me about an hour and a half to assemble by myself.  I checked the video a few times, but it didn't really clarify anything.  (What do those stop signs in the print instructions mean?  Why do I have 2 "D" capnuts, 1 "DD" screw, and 1 "F" part leftover?  Why do my front wheels swivel outwards when the directions show they shouldn't?)  The joy on my son's face as he rides around in his new car is well worth my time and effort!