Make a game of it. Commercial dice with letters rather than numbers. Take turns with your child in tossing them and building words. List the words as they are made. The list can be saved and added to each time you play.
Listening skills do help spelling.
Play these games just for a few moments before supper, or after breakfast to develop your child's ability to hear sounds in words. Rhyming words is another game that can build spelling skills. As your child says hill, Bill, till, and so on, write them down. He'll soon notice, himself, that they have identical endings. This is a game to develop visual memory.