Jacob's Ladder

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A Jacob's ladder (also magic tablets, Chinese blocks, and klick-klack toy) 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. Different shapes and formations can be made with the blocks. 

Jacob's Ladder 1
Source: USA
Jacob's Ladder 2
Source: USA
Jacob's Ladder 3
Source: USA