Give 'em a Boost
Make room for a better booster.
The Cybex Solution X-Fix is a German-engineered carseat for ages 3 and up with a very smart innovation: the three-position reclining headrest allows a sleeping child's head to tilt back instead of slumping forward (i.e. out of the protected zone). This feature, along with 11 adjustable height settings, maximizes side-impact safety.
Available for $220 at amazon.com.
Related: Professional Babyproofers: Spreading Fear Or Safety?
Start by teaching him that it is safe to do so.