Jacob's Ladder Folding Block Toy

Cut the hobby board into 3in blocks using a miter saw with a stop block, so every block comes out exactly the same length.

Sand the corners of each block round.

Paint each block a different color on each face and edge.

Cut the grosgrain ribbon into pieces sized to connect the blocks in the classic zigzag Jacob's Ladder pattern.

Attach the ribbons to the backs of the blocks with small brad nails, alternating the attachment pattern so the blocks fold and cascade when tipped.