Today in my after-school program we made Jacob's Ladders to hopefully sell later! Some of the students were pretty creative! Here is what Wikipedia has to say about them:
A Jacob's ladder is a folk toy consisting of blocks of wood held together by strings or ribbons. When the ladder is held at one end, blocks appear to cascade down the strings. However, this effect is a visual illusion which is the result of one block after another flipping over.
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