I was disappointed in this toy. I bought it for my 6 year old grandson and didn't even give it to him for Christmas. I was ashamed to give it. I looks like a piece of junk. It says 643 pcs but it looks more like 25. I just put it away and will give it to him some other time when a nice gift isn't expected. I would not buy anymore of these erector sets.. Disappointed Nana.