This is pretty simple...if you want a chance to win a free 'Exploding Robot' t-shirt you need to do one of the following:
Twitter: Follow @CADatonic on Twitter, Tweet this blog, hashtag #CADatonicBlogContest
Instagram: Follow @CADatonic on Instagram, cut and paste the image below to your instagram feed, in the instagram description field enter the text '@CADatonic blog contest t-shirt giveaway'
Tweeting and Instagraming gives you two entries (twice the chance to win!)
A few more details: You cannot be a previous 'Exploding Robot' t-shirt winner. There will be multiple winners. The first entrant wins automatically!! Available sizes - M, L, XL. Contest ends Friday, February 28th at midnight. Winners announced Saturday the 29th. Good luck!