I know the skeleton demonstration has been discussed here before and I *think* someone might have posted a video at some point, but basically the skeleton demonstration shows why kids should stay in booster seats even if they are no longer required by law.
I have a Lego car seat (as in vehicle seat, not child safety seat) with a shoelace lap belt. I also have a Lego backless booster. And I have a skeleton with a hollow abdomen, and I put a Little Debbie Strawberry Shortcake (which is like a Twinkie but has red goo as well as white goo inside) in the skeleton's abdominal cavity.
I sit the skeleton in the "booster" seat, which positions the "lap belt" across its hipbones, and I pull the belt to simulate crash forces. Nothing happens. Then I take out the booster seat and reposition the skeleton, and the lap belt is crossing the abdomen. I pull to simulate a crash, and the belt cuts through the cake and goo oozes all over.
This really helps kids (and parents) *get* why it's important to use a booster, even if state law allows otherwise, if the vehicle belt is riding up on the abdomen and not low on the hips/thighs.
KQ, it was "Spirit of Halloween". It's a really ugly skeleton, so I dress mine up a little. This year I'm going to buy a few extras, because they do get gross, and I think mine might need to go through the dishwasher or something now, and I don't know how it will hold up. If I can find them again, and if we remember, I'll get you one. It's a perfect fit for the twinkie-cake.