I'm doing a ●●●●●●s in law cheap ●●●●●●ntin "I show them two boxes and tell them that one box has seeds with ●●●●●●c ●●●●●●iser while the other has seeds with ●●●●●●tic ●●●●●●iser. Then I put a lid over both the boxes and say let's see which grows ●●●●●●.
