NUMBERBLOCKS AS SEEN ON TV: Discover what happens when you add or subtract 1 with these simple 2-piece Numberblocks jigsaw puzzles based on the award-winning TV series. ADD & SUBTRACT: Make learning simple addition and subtraction fun for young children! As children complete the 20 colourful puzzles, they’ll be building basic maths skills along with colour recognition and fine motor skills. MATCH NUMBERS & PICTURES: See the addition or subtraction question, count the Numberblocks on the puzzle piece, and then find the correct answer piece. SELF-CORRECTING PUZZLES: Each of these clever self-correcting Numberblocks counting puzzles fits together in a unique way, so there’s only one right answer. INCLUDES: 20 x 2-piece puzzles. The chunky pieces are made from durable card and are easy for little hands to hold. Pieces store in the reusable packaging after play. Completed puzzles measure 15cm L x 10cm W.