Here is an idea for fun and easy way that we practiced letter recognition today. We took a pasta box that had a clear front in it and cut it out. Then we glued that onto a Popsicle stick.
I walked around the room with Sophia and got my cheesiest voice out so we could pretend we were spies on a letter hunt. She ended up calling it her "Super letter spying tool" I let her either find the letter we were searching for itself or something that started with that letter. Even Little Man got giggly and enjoyed himself with us. He was walking around copying big sister and saying 'Ba, ba, Ballll!" or whatever letter sounds she was making.