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Add On: One of the oldest bouldering drills is the simple game of add on. Add on is traditionally done with one partner to increase climbing time. The first climber selects two start holds and then adds two moves and comes down. The second climber repeats the moves and adds two moves. The goal is not to stump your partner, but to create a long problem that builds a pump on moves neither climber might have created on their own. The drill ends when one climber can no longer complete the route or add on any moves. Add on can also be done with one person on the ground with a laser pointer or long stick. They point to the next hold and the climber attempts the moves until they come off the wall.