Hendecagon

The word "hendecagon" comes from the Greek words "hendeka" meaning 11 and "gon" meaning corner or vertex. Master of Puzzles Calvin O. Brown created this brain-teaser in 1957 and it continues to test puzzlers even today. Simply move the red peg from one circle to the next! There are very few restrictions, but it can certainly be done  . . .  if you’re clever enough! Made in the USA for ages 8+.