To sign wheel, take your two fists in front of your body, stick your pointer fingers out, and make simultaneous circular motions up and out, then down and in, and repeat. It's as if you are tracing the shape of wheels on either side of your body.
Teach your baby the wheel sign based on real-life observations, like on the family car, bicycle, or baby stroller. You can also use the occasion of seeing wheels out in the park or in cartoons or on the computer, to teach your baby the sign.
Use the wheel flash card when you are helping your baby or toddler explore concepts related to transportation and mobility.