S1 E21 | The George Washington Problem; The High Noon Problem

E40 | The Bermuda Triangle Problem; The Breeze in the Branches Problem

E36 | Richard the Third; The Lemonade Problem

E21 | The George Washington Problem; The High Noon Problem

E14 | The Blockette Problem; The Tulip Problem

E13 | The Birthday Cake Problem; The Doohickey Problem

E6 | The Messy Room Problem; The Golden Pyramid Problem

E5 | The Tree Problem; Another Tree Problem

E2 | The Pirate Problem; The Sleepover Problem

E1 | The Chicken Problem; The Space Creature Problem