Signing: To sign fire, you make your fingers like the flickering flames of a fire. Take both hands open with your fingers wiggling back and forth. Then cycle your hand up and down in vertical circles. Usage: If you have a fireplace or a gas stove, baby will often be intrigues by the flames which is a good time to introduce the sign fire. As baby gets older, you can link the concepts of fire and hot. Flash Card: Click the link to view the Fire Baby Sign Language Flash Card. The flash cards are printable and available in both U.S. Letter and A4 sizes.