I use these sound boxes with students in my small group who need more work with their sounds and building words. I have it color coded to help them identify where the sound is in the word. You can have them move chips in the boxes so its just phonemic awareness and then you can also have them build words in the boxes using letter tiles.
I also laminated mine after I printed, and they can even write on it with a dry erase marker. They get messy so make sure you have a cleaner every time. Even if you don't want them to write on it, its still good to have laminated so you can keep using it from year to year.