Explore the relationship between Numberblocks One through Ten by adding or subtracting One to find a new Numberblock friend. These 2-piece, self-correcting puzzles perfectly illustrate the power of Number Magic!

• Includes 20 colorful, 2-piece puzzles featuring Numberblocks One to Ten.
• Self-correcting puzzles are great for practicing early addition and subtraction from 1 to 10.