This challenging puzzle set with hundred excises was made out of wood and prepared specially for Math Kangaroo (MK) in USA. That was the most appreciated (and the most expensive) gif for each participant of Math Kangaroo 2017. Families arranged for tea parties with playing those puzzles! Dimensions: 2 in by 9.25 in by 0.5 in. Enjoy free shipping with this purchase! The supply is limited.