These packs of alphabet letters and numbers are made from silicon - a very strong stable and inherently safe material that can be used and then cleaned in a dishwasher without harm. It is soft and pliable to the touch so is ideal for younger children from 3+.They are made in transparent colours that can be used by children in their everyday play - in the sand pit on the floor on a light panel and even in water without harm.Made in a large format and in a school friendly font Silishape are 120mm in height for easy handling by children and by teachers for demonstration purposes or for display.Available in an Alphabet pack of 26 or Numbers pack of 10.