KiLeeO, when you say only moved forward and backward do you men it didn't turn? Or was it one that turn one direction only and only when going backwards? If it turned both directions going for wads was it proportional or just full left, full right and straight.
What collector1231 discusses above does not seem to me to be anywhere near an entry level car/truck. My stepson got his Grasshopper when he was about 8 sent by his father for Christmas. While his father did a lot of the assemply I would up doing most of it. It was pretty basic.