This is a puzzle by a famous American “puzzler” Sam Lloyd. Sam was a famous chess player, ranked 15th in the world at his best. He is also the creator of many famous puzzles. The following puzzle is in the form of a graphic, which says it all:
It is important that no algebra is used to solve this puzzle, and I think the younger children will enjoy this puzzle.
As always, please send your answers directly to me at firstname.lastname@example.org. If you like the puzzle, please share it with others. If you have interesting puzzles to share, please send them to me at my e-mail given above.