Numberblocks are the friendly characters from the award-winning BBC TV series. The series brings math learning to life with Numberblocks MathLink Cubes! Children see how numbers really work as they build their own Numberblocks from 11 to 20, by connecting them with classic mathlink cubes. Each set can build all the friendly characters from Numberblocks so you can follow along with the show, or play on your own! Details: Numberblocks MathLink® Cubes 11-20 design 10.6 x 8 x 2.2 For ages 3 and up Contents: 155 MathLink Numberblocks Cubes 52 faceplates 44 stickers 10 numberlings 10 character cards 15 double-sided Write 'N' Wipe activity cards Fourteen's Skateboard and Helmet Twenty's Top Hat 1 write and wipe pen 1 activity guide