🟨Wooden 3D Falling Block Puzzle (often called Russian Block or Tetris puzzle). Design: The set includes a vertical wooden board with slots or a house-shaped frame and multiple brightly colored, interlocking, Tetris-like polyomino blocks 🟥🟨. Function: The goal is to arrange and stack the blocks to fill the entire space on the board without gaps, often following pattern challenge cards 🃏. The vertical orientation adds a spatial/3D challenge. Benefits: It is a valuable Montessori educational to