Uplift bamboo rocker board - $30 (palo alto)

Keep moving at your desk on a stable board.
Get on your feet and rock side to side Features a durable, sleek, and attractive solid bamboo deck and durable injection-molded plastic base Solid and sturdy deck, engineered with a weight capacity of 250 lb Built-in rubber bumpers increase stability and protect against bumps Costs $120 new on amazon and this one is in excellent condition.