Wind blows desert sand Windmills spin like old pinwheels Faster and faster. When I was a kid I loved pinwheels.  Instead of blowing on my pinwheel I’d ride around the neighborhood on my bike watching the wheel spinning faster and faster.  I never went fast enough to get airborne though I tried.  When I visit Palm Springs I like watching the modern windmills spinning along the 10 freeway.  The huge 3 bladed ones usually spin at moderate speed and smaller ones with more blades spin faster.