A very simple concept using a paper plate. Focus on a few sounds or all the sounds in a particular phase. All you need to do is write the sounds all around the edge of the plate, cut at each side and the child bends over the sound they hear. You could read words and they have to find the beginning sound or just say the sound and they have to find it and bend it over.
You could also ask them to spell a word for you by bending over the appropriate graphemes in the correct order.