Race these old dears at crippling speeds. Just wind then up and watch them go! It’s not quite as easy as it seems though. There is a smidgen of skill too, adjust the grannies arms to find the best racing position. Race your grannies to settle office disputes, who buys the next round, or who’s doing the dishes tonight. Or why not set up a granny assault course and find out which zimmer is the winner! Is your granny fast or furious?