Highway Letter Cards
Yep, just like they sound, these are letter shapes made into roads. Yes, roads! I have a feeling the boys might kind of enjoy these. You can print off uppercase and/or lowercase letters of these cards. I would really recommend only uppercase for now if your child has not learned all of the letters yet. Then, using a small car, have your child say the letter name and trace the road with the car. We practice using a "pointer pencil" at school in the air or on the carpet, but this is just another way for them to use motor skills to learn the letter shape.
Play-doh Letter Snakes
MakingLearningFun.com also has these neat letter cards your child can use to help make the letters from play-doh. I actually used to use wax paper and wrote the letter with a Sharpie. Then my son would roll play-doh snakes and place them over the letter shape while saying the letter name. This is just another way for your preschooler to work on learning letters yet have fun while doing it!
Happy letter learning!