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!
ABC Stomp Mat OR write ABCs in chalk outside to play Call out a colour. Everyone jumps on a letter of that colour and takes turns saying their letter name or sound. OR Match letter cards to the mat (upper/lower case)
15+ Preschool Alphabet Activities and Mom's Library #66
What a fun game! Make two dice: one with numbers, and one with colors. Roll the dice, then use dot stamps to make that number of dots in that color on your paper. My adaption would be to have the dice be a doubles dice to practice double math facts