How do i take part in challenges?

can any one tell me were to go or what to do to take part in chalenges.

1 Answer

-Choose a challenge: http://grabcad.com/challenges
-Read everything on the page of the challenge you want to participate in.
-You'll most likely find certain dimension limits, or even cad models to start with.
-Make your awesome CAD model! (according to the rules set by the challenge)
-Upload your file by going to the right challenge page again, and choose "upload model".
-Win