Numberblocks 1-20, 16-20 16-29 Over 150 blocks to play with ? Arithmetic Learning Toys: The Cbeebies characters will make learning fun for any Numberblocks fan ? Colourful and Fun cubes: Includes 80 vibrant pieces that can stack together. Make the Numberblock character or invent your own. puffy sheets to stick onto blocks ? Safe Quality Learning Resources: minimal design with a smooth surface made from durable plastic. Number blocks are made by environmentally friendly materials, which is safe for kids. ? Size Recommendation: Size - 300mm x250mm | For children over 3 years old. ? Learning and Developing foundation arithmetic skills: These maths blocks can help children have fun in learning and improve their arithmetic calculation skills at the same time. It can support kids . Best choice for children's gift! Perfect for any Numberblocks fan will keep them busy for hours !