Ah, good ol' alumni news brought this little tidbit:
Liu's off-the-job tinkering has revived his childhood interest not only in model airplanes, but also in LEGOs. By combining the plastic bricks with a heat sensor from a burglar alarm, Liu recently cobbled together a device that launches toy mice at his two Birman cats. Dubbed a "mouseapult" (as opposed to a catapult) by Liu and his wife Julie, the device sits on the floor in the middle of a room, rotating around in search of a warm body. When it spots a moving heat source, the mouseapult hurls a fur mouse toy from its magazine in the direction of the heat source. (Link)Much as I have no love for cats, that's one heck of a cool toy.