Decided my next LEGO quest is one- or two-wheeled and two-legged contraptions that don’t fall over. Truck front-end assemblies haven’t captured my imagination, perhaps because they tend to rely on composite LEGO parts to circumvent engineering challenges, or maybe trucks aren’t my thing. I’ll need a LEGO MINDSTORMS gyro sensor, just ordered via eBay (because LEGO no longer makes them).