Yes. Even putting aside the monetary cost of the seats (which if you buy second hand is fairly minimal - around £30 in the UK), the time-cost of researching an

Yes. Even putting aside the monetary cost of the seats (which if you buy second hand is fairly minimal - around £30 in the UK), the time-cost of researching and buying them, installing them (in yours, and grandparents' cars), taking them in an out the car if you're using the car for other things, doing up the fiddly catches on each car trip, is pretty high. We have one child under two and I reckon it's probably cost a good (working) day of time in total, which quickly adds up when multiplied across the population. This should at least factor into the discussion when considering what the law should be.