Worst construction toy EVER. I spent a few HOURS on ONE vehicle after my (five-year-old) son went to bed. Just to make all of the necessary pieces join together as shown in the instructions, I was using tools no child of the age range for which this toy was supposedly designed should have access to. The pain from the tension in my hands nearly brought me to tears on more than one occasion. I have very little confidence that I'll ever be able to deconstruct this first vehicle to make either of the other two vehicles.My advice? Steer clear of this and get your child(ren) a good old-fashioned American Erector set! (We have one of those that we dearly love, but this was a gift I wish I could return.)