Want a good, extremely challenging Free Lego Technic game to play over the holidays? Check this out! It's called Cogitate.
“In our tests, we found downloads on this site that some people consider adware, spyware or other potentially unwanted programs.” There is also other feedback from others saying they had no problems, and I had no problems. I have my security set pretty high.
Here’s another Lego game that I found fun too. It starts out pretty easy, but over 40 or so challenges, it gets harder. It's called Lego Junkbot.