Legos were always my favorite toy. I used to play with them all the time until, sadly, my mom gave them all away to my younger cousins when I got older. But LeoCAD is the next best thing. It\’s a free program for Windows and Linux where you can build any Lego creation you want. They currently have more than 1000 pieces. Like most CAD programs, it\’s a little hard to use at first, but I picked it up pretty fast.