Something to force childern to be in a proper seat for their age. This has turn into a grip for me and something I never noticed before. Countless times I see people driving with their kids not buckled in or babies on their laps. If you use your own seatbelt, shouldn't you use one for the most important person(s) in your life?

Sorry for going off topic...
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"One should not increase, beyond what is necessary, the number of entities required to explain anything"
William of Ockham (1285-1349)