I'd had my eye on this kit for a while, but felt it was a little expensive. I managed to get it on offer for £5 and am really pleased with it. For £5 it's good value and a nice concept. I would feel alittle less happy at £7.99! Your child will probably need some help attaching the pieces to the box, but will love playing with the wagon they helped build. My little one who is almost 3 attached the wheels himself once I'd screwed on the attachments.
It comes in quite a small resealable pack. I think the pictures on Amazon are pretty clear about what you're getting! I am quite impressed about how sturdy the pieces seem.