These Wooden Discs have pre-drilled holes so can easily be hung around your room in your outdoor space or be used alongside a self-registration tree at the entrance. Alternatively you could write individual numbers letters or phonemes to aid with number recognition alphabet and phonics.Pack contains 25 pieces or around 250g. Diameter: 40 - 70mm thickness 5mm. These items are not toys they are intended for use in an educational environment to support curricular activities. Not suitable for children under 36 months when unsupervised due to risk of ingestion & choking. Age Suitability: 3 Years +