Lisa taught him the sign for car, which is like turning a steering wheel, but in his rendition both hands go up and down at the same time. It seems to work for getting into the car, and also for walking up close to any car, say in a neighbor's driveway.
Dancing continues to be a favorite activity. I thought my sign for that (arms shaped like a cradle) wasn't getting through since he's always so desperate to be picked up he seemed only annoyed at my signing diversion, but after a week or so he started doing it. Today we even got "down, dance" in sign.
He remains fascinated with lights of all kinds, and now the traffic light at the corner provides a new form of illuminated fascination. When Nana and Papa were here he got to do a lot of staring at the light as it cycled through its colors, and he tried to figure out how it was connected with the cars stopping and going. The traffic light gets the same sign as other lights (opening and closing fist facing outward).