Check out our Things to Print area. Use our coloring pages as letter stencils, and print the special letter guides we have for little letters and big letters. Help them label pictures they've drawn. Copy letters or words from books or newspapers. Practice upper and lower case.
Many letters are simply balls and sticks, circles and lines.
Have kids write name place-labels for everyone who will be sitting down to eat breakfast or dinner. Encourage your kids, and don't be harsh if they make mistakes. Spend time to sit and write with them. To help, you could draw lines on paper or buy writing strips from a stationery store. Have them copy you, letter by letter.