Tick-tock, the math teaching clock! Teaching Clock Wooden Puzzle by Bigjig is a simple toy with so many learning opportunities. This teaching clock creates a fun way to learn about numbers, shapes, colors and telling the time. The clock features 12 round, removable pieces with numbers 1 to 12. Each piece is color coordinated with its base slot to develop recall and recognition skills. There are even handy annotations around the clock to teach children 'telling the time' vocabulary including 'quarter to', 'quarter past', 'half past' and more! helps to develop dexterity, matching skills and concentration. Made from high quality, responsibly sourced materials. Educational Toys Planet's clock is 8.85" in diameter.