Mastermind Toys has just posted a Flash Giveaway on its Facebook page in which you can win a ThinkFun Roller Coaster Challenge (a part logic game, part engineering puzzle).
To enter, like Mastermind Toys on Facebook: https://www.facebook.com/MastermindToys
Go to the contest post and leave a comment mentioning what you would name your coaster. There is a limit of one entry per family/household.
Giveaway ends Thursday August 31, 2017 at 11:59 pm EST. Winner will be chosen at random from among all the elegible entries.