This 30 piece activity floor puzzle is an underwater adventure full of friendly sea creatures children will love, and is a great way to learn the numbers 1-20. My 123 Under the Sea encourages a range of maths skills, from counting to 20, recognition of colours, shapes and patterns, sequencing and the concepts of more than and less than. Ask questions such as are there more yellow creatures or green? How many are stripy? Lots more tips on extending play value can be found on the box. There is a handy posting slot at the top of the box so that children can post their pieces and help with clearing away.My World puzzles and games are a fun, colourful way for children to learn about the world around them and have been developed in conjunction with child psychologist and play specialist, Dr Amanda Gummer. They complement the learning goals of the National Curriculum, as well as enhancing general skills such as concentration, imagination, communication, observation and hand-eye coordination. As with all My World puzzles and games they are made in Britain using 100% recycled board.