I mounted these vintage flashcards onto the wall of my boy's bedroom with mounting tape. At night as a part of our nightly routine, we use a flashlight that we keep by the side of the bed and we go through an alphabet quiz. I ask Max for a letter and then he points to it with his flashlight. It's a fun way to practice our letters.
Cost: less than five dollars for flashcards, or free is you make you own on the computer and hang them up.
Variation: For older kids you could say a word and they would have to shine the light on the letter it starts with. Or you could shine the light on a letter and they have to say a word that starts with that letter. You could get really tricky and say, What is the third letter in penguin??? Also, we sometimes take the flashlight around the house and do a bit of a scavenger hunt. Where's your toothbrush? Where is the refrigerator? Where is the front door? Where is the baby?