The letter H is signed by holding out your dominant hand horizontally, palm facing in, with your index and middle fingers held out together, straight and stacked horizontally, index at the top. The rest of the fingers and thumb are curled in.
Teach your toddler the letter H sign when it is necessary to finger-spell some simple words - or the initials of objects, places, animals, or people's names. That way, your toddler slowly begins to associate the sign with the sound of the letter in a word or name.
This is a useful flash card taught best in conjunction with the other letters of the alphabet.