About ten years ago I attended a training by Janet Chambers, a teacher-author who shared wonderful ideas about teaching literacy. One of her ideas that really stuck with me was that of a "big event" to introduce each letter of the alphabet. Ever since, we've had an alphabet worth of big events here at school each year. (See her book, Ready, Set, READ here.)
For the letter E, I've put together a small Easter basket of plastic eggs, each with something that begins with the letter e: envelope, Elmo, toy eggs, elephants - and some that are empty. The kiddos LOVE it!