What activities do you do for the children to finger trace letter, number and shape outlines.
A shallow sand tray was always very popular with our children, smeared paint on a table top and shaving foam/normal soap spread over the table top!
:idea: Fill a ziplock (or similar) bag with a transparent gel (shampoo/after sun) zip it up and lay it over a piece of white paper let the children create impressions into the gel with their fingers.
Could also add some glitter to the gel and use pre written letter sheets under the bag to aid formation of the letter/numbers.