Water Works is/was also a card game by Parker Brothers, not explicitly connected to Monopoly. Each player attempts to build an unbroken pipe from a faucet to a spigot, while other players try to lay broken pipes over your healthy ones. You must repair these leaks with matching healthy pipes, matching leakproof copper pipes, or a little golden wrench token before proceeding. Not a terrifically deep game, but diverting for kids.