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Beginning (grandma on the right) – Get on your knees and elbows on the ground, walk hands up to push up position one at a time then back down to elbows.
Intermediate (mom in the middle) – Walk hands up to push up position then back down to elbows, then walk feet out, out, in, in.
Advanced (me on the right) – Walk hands up to push up position then back down to elbows, then jump feet out and in.