This tube will help your child learn about multiplications and divisions from numbers 1 to 10 in a fun and straightforward way. Simply turn the two-coloured knobs at the end of the tube and the calculations will appear in the window along the 21 cm long tube. Suits ages 5 years +. Features: A fun way to start learning maths This tube will help your child learn about multiplications and divisions from numbers 1 to 10 in a fun and straightforward way Simply turn the two-coloured knobs at the end of the tube Then calculations will appear in the window along the tube The tubes length is 21 cm Suits ages 5 years + Specifications: Dimensions: H:4.8 x W:14.1 x D:21.4 cm Weight: 0.3 kg Colour: Multi Material: Plastic Model Number: 2561