It looks like it has enough pieces (based on assembling it in my head) with the exception of one of the front wheels (the "half-wheels") - I can only see one in there. Unless you are going to assemble it as some kind of "Reliant Robin Stank" (which might be rad) then you will need to replace that piece (a single plastic wheel cut in half would allow you to replace both front wheels with identical pieces, of course).