In one package of VBS Foam rubber "Letters" there are about 200 pieces of self-adhesive letters with a height of about 2 cm.
The colourful letters are great for the Card design maybe use it as an invitation card for the next kid's birthday party. Also for self made School gift bags they are very well suited.
Another possibility would be to use these letters for learning to write. The words must first be placed correctly and then written by yourself.