From the friendly TV series Numberblocks, an award winning show from BBC, the Numberblocks crew brings math learning to life with this officially licensed adding and subtracting puzzle set! Explore the relationship between Numberblocks one through ten by adding or subtracting to find a new Numberblock friend. These two piece, self-correcting puzzles perfectly illustrate the power of Number Magic! Details: Assorted Numberblocks characters, colors and designs 8.5" x 6.5" x 3" packaging size 40 pieces Includes 20 self-correcting puzzles Officially licensed Suitable for ages 3 and up