Logic Workbook for Gritty Kids: Spatial reasoning, math puzzles, word games, logic problems, activities, two-player games. (The Gritty Little Lamb companion book for developing problem solving, critical thinking & STEM skills in kids ages 6, 7, 8, 9, 10.)

Another Logic Workbook for Gritty Kids: Spatial Reasoning, Math Puzzles, Word Games, Logic Problems, Focus Activities, Two-Player Games. (Develop Problem Solving, Critical Thinking, Analytical & STEM Skills in Kids Ages 8, 9, 10, 11, 12.)

My First Logic Workbook for Gritty Kids: Spatial Reasoning, Math Puzzles, Logic Problems, Focus Activities. (Develop Problem Solving, Critical Thinking, Analytical & STEM Skills in Kids Ages 4, 5, 6.)

The Hardest Logic Workbook for Gritty Kids: Spatial Reasoning, Math Puzzles, Word Games, Logic Problems, Focus Activities, Two-Player Games. (Develop Problem Solving, Critical Thinking, Analytical & STEM Skills in Kids Ages 10, 11, 12.)

An Intermediate Logic Workbook for Gritty Kids: Spatial Reasoning, Math Puzzles, Word Games, Logic Problems, Focus Activities, Two-Player Games. (Develop Problem Solving, Critical Thinking, Analytical & STEM Skills in Kids Ages 8, 9, 10.)

How to lie with statistics

Another Logic Workbook for Gritty Kids: Spatial Reasoning, Math Puzzles, Word Games, Logic Problems, Focus Activities, Two-Player Games. (Develop Problem Solving, Critical Thinking, Analytical & STEM Skills in Kids Ages 8, 9, 10, 11, 12.)

Do the Math!: Challenging, Fun Math Puzzles for Kids

My First Logic Workbook for Gritty Kids: Spatial Reasoning, Math Puzzles, Logic Problems, Focus Activities. (Develop Problem Solving, Critical Thinking, Analytical & STEM Skills in Kids Ages 4, 5, 6.)

The Hardest Logic Workbook for Gritty Kids: Spatial Reasoning, Math Puzzles, Word Games, Logic Problems, Focus Activities, Two-Player Games. (Develop Problem Solving, Critical Thinking, Analytical & STEM Skills in Kids Ages 10, 11, 12.)