You can easily adapt this alphabet mail activity for kids from @ No Time For Flash Cards, for speech and language in the the therapy room or the home. Try putting pictures of vocabulary or articulation words in the envelopes!
35+ Alphabet Activities for Toddlers & Preschoolers
Walking the S - Great kinesthetic activity for kids learning the alphabet. Works with any letter. Have child walk heel-toe, heel toe and maneuver the S like a balance beam. Special needs, preschool, kindergarten, alphabet fun