crank with one bar

an animation Sadie Scheffer and I made of a crank with a single bar.

These are some models made by young people in Scotland which use this mechanism:

singing girl
boat
sunset
easter bunny
car crash
drummer
man blowing bubbles (plan)
man blowing bubbles
man kicking soccer ball
flapping bird
ship crashing into iceberg
girl jumping on trampaulin (close-up)