Fantasic ContraptionWow!
Bored.com has some really cool games. Fantastic Contraption is one among them. This game is along the lines of the award winning game
Crayon Physics Deluxe. You are given various tools, like wooden

rods, water rods, wheels that turn clockwise and anticlockwise, and wheels that turn only on being pushed. To win you need to make a pink ball reach the goal (a pink block). You get a blue workshop area where to build your contraptions. There is also a save option for those who start despairing after a few failed contraptions. 21 levels of fun (and little thinking included)!
The link:
Fantasic Contraption