Portal Lego Creation

I really think my students are some of the best Lego creators I have ever met. I  am constantly astounded by their K'Nex and Lego creations they create without any directions at all. Keep in mind, they do all these projects while the other students finish their work. So this isn't just free time, they finish their work fast so they can build cool things! :)

Here is their Portal creation.  :)