In Tinker Ball, You have a cup not a box as a goal, You have to build an obstacle for the ball to get through. You can only start your invention and you can not stop it.
You have a box not a cup as your goal. In fantastic Contraption, You have to build a small machine out of circles and rods. You can start and you can stop your invention. You have to build something in both of the games. The things you use to get to the goal both roll. You have a goal in both of the games.