A letter board is a cool thing with little pieces of plastic or wood that have letters and symbols on them. You can move around the little pieces to make words and phrases and it's super fun! It's like playing with a puzzle, but instead of trying to fit different shapes together, you're trying to spell out different words. You can hang up your letter board on the wall and change the message every day to tell your family and friends what's on your mind. It's a great way to express yourself and share your thoughts with others!