In this physics activity, learners construct a small-scale version of a classic carnival game. A large marble is rolled along a track made from a commonly available and inexpensive metal shelf bracket. The track is gently bent so that there is a flat portion, then a small hill, and finally a steep uphill portion. The objective is to roll the ball so that it goes over the first hill, but does not come back over the hill -- the ball should remain in the dip between the two hills. The process involves nice illustrations of the interplay of kinetic energy, potential energy and friction.