Shaving cream writing: spray a small amount of shaving cream in the bathtub on the wall and let your students write their letters while taking a bath.
Sight word flashcards: Have your child help you to make and decorate flashcards with sightwords on them. Then each night before bed you could read through them together.
Making patterns with colored food: Get multi colored snacks (goldfish,fruit loops, candy) and have your child create a pattern before eating it. This will be fun because your child will like that they are able to "play" with their food.
Make movement and sound patterns: You could do this throughout the day or in the car on the way to school. Come up with some patterns like: snap snap clap... stomp stomp jump... "a" "a" 'b"... clap clap sit