Here’s an online alphabet game (suitable for Kindergarten English students) that I sometimes let the kids play if they’ve finished their craft early. (If it doesn’t work for you, make sure your browser isn’t blocking the pop-up that enables the Flash plugin to run.) This game works best with an interactive whiteboard.
If you’ve got a few children in your class, it might be an idea to have them line up to take a turn (and practice turn-taking at the same time!). If you have lots of students, its best to find something that keeps all of the children occupied (and learning), instead.