Hold a fresh ice cube at the top of the cookie sheet. This is your mini-glacier. Pressing on the glacier, push it slowly down the mountain. This water is the meltwater. The friction makes enough heat to melt some of the bottom ice.
Most polar glaciers are too cold to have meltwater.
They are frozen to bedrock. Let the glacier side down the mountain several times on its own. The more meltwater, the faster it moves because the friction is reduced. Sprinkle some sand on the waxed paper. Put the glacier on top of the sand and hold it there for a few minutes.