Good game to modify, a little like Zas--Kindergarten Kel: Chicka Chicka Boom Boom Letter Recognition Activitty. Kids pick letter cards, read it, keep it, if they get BOOM card they put all cards back. Kid with most cards at the end wins.
Alphafriends song - Fisher's school uses these. This video is about 4 minutes long and goes through the name and sound for all of the letters. Then there are individual 1 min videos of each letter in a little more detail