Milk Carton – Magnetic Lowercase Letters Magnetic letters are the perfect tool for young kids learning how to spell. They are suitable to use on any magnetic surface such as a whiteboard or fridge. This pack comes in a unique milk carton style packaging and each letter has a nice pattern printed on it. The letters are wooden with a magnetic strip layered on the backside. Contains 40 pieces. Not suitable for children under three years old due to small parts. Keep out of their reach.