The instructions are clear enough to follow they are displayed in pictures rather than words so even if your child can not read yet they will still be able to follow them. I would recommend that an adult helps a smaller child to push in the small plastic pins as this requires a little bit of pressure.
In the box you can construct a handy tool that helps you press in the plastic pins ore helps to remove them. We found that if the clips didn't quite fit you could stretch them slightly using the handy tool.
Both the boys really enjoyed this activity, it also has many opportunities to develop hand eye coordination skills & also to learn colours. They spent some time after we built them vrooming them around their bedrooms racing each other. They are really sturdy toys that despite rough play have stayed intact. They can be rebuilt as often as your child wishes too.
They are reasonably priced & also have more vehicles in the mic o mic range.