If you never could find the ultimate toy car as a kid, here’s your chance to achieve that (modest) dream. The Hot Wheels Car Maker ($40) is a do-it-yourself playset that lets you make your own cars. It also involves cool stuff like melting wax and slapping decals on your creations. It’s pretty much just like being on an assembly line, only there’s no nagging boss around telling you you can’t toss back a few while manning the heavy machinery.