There are many magnets available that are dedicated for use on wipe boards, whiteboards and dry-wipe boards. Typically, ferrite notice board magnets are very popular due to their low cost, bright colours, good strength and ease of handling. These magnets can come in a vast range of sizes and shapes allowing you to select the perfect magnet for your requirements.  Neodymium variations are also available for applications where a great force is required. Flexible magnetic rubber is also a good option.  These can be purchased in a larger number of different shapes, sizes and colours including squares and circles which are perfect for planning boards.  Flexible magnetic rubber grid lines are also available in a number of colours and thicknesses which again are perfect for creating planning boards.