From the friendly TV series Numberblocks, an award winning show from BBC, the Numberblocks crew brings math learning to life with this officially licensed sequencing puzzle set! Numberblocks one to twenty are ready to help children learn early counting and number sequencing skills. Start by building a five piece puzzle featuring Numberblocks one to five and gradually progress to building a 20 piece puzzle. Details: Assorted Numberblocks characters, colors and designs 10.5" x 6.5" x 1.5" packaging size 50 pieces Includes 10 self-correcting puzzles Officially licensed Suitable for ages 3 and up