Plant it to grow Steam Valve. This links up to other Steam blocks and can conduct steam power. If steam enters this block from the top or bottom, it will go out the bigger side, and the valve will flip for the next time.
Steam Valve Seed price in Growtopia: sells for about 12 WL (median of 1 offers from community Discords, past 30 days). Live price chart and the latest buy and sell offers.
Recently sold at: BOLZO