Oh boy was this ever the most perfect product and so fast!I work with 7 little lads between the ages of 4 and 12 at a children's home and decided to do some models with them as I had as a kid. They were so hard to find - and I don't know why - it brought such incredible joy to little lads with hard lives. The models were just hard enough to be thrilling and a source of pride at accomplishment, but just easy enough that even the 5 year had great success. The cars were of fantastic metal die cast quality - have moving parts and have now endured many hours of play with doors that open wide enough to stuff things in and have races - oh yeah! Really the best! What more can be said when a little boy whose had a hard life is holding the car aloft proclaiming it to be the best day of his life! And then cradles the car like a baby while I read him bed time story because he just can't put the car down! I have no idea why models aren't popular any more, but I've been making rockets, aircrafts, and race cars with these kids and nothing pleases them more than to actually build stuff that looks so cool. It's such a source of pride and accomplishment. Of all the models we've built, these race cars are by far the very best and very best quality. I immediately purchased more after the first one when I saw how great it was - and no messy glue - everything fits perfectly. It's the perfect project to complete in one afternoon....after homework, of course! The best thing I've ever seen in all the world is the light of joy in little kids eyes and do these models every put it there! I VERY highly recommend them without reserve!