Our new neighbours have a child who looks about 2 years old.
The other day I saw them carrying her into the building in an infant carrier car seat (one of the small, rear facing ones).
She was asleep so maybe her head was lolling back more, but she looked way too big for it, the top of her head was well above the back of the seat. Her knees were hanging over the edge of the seat too, (although I know that doesn't necessarily matter)
I thought it might have been a one off, but I saw them again this morning taking her and the seat to a car. It even looked like they might have been strapping it in facing forwards, but I could well have been mistaken.
Does it sound like the seat is too small? Ought I to mention it to them? I haven't really spoken to them before, I don't speak the language and would find it really hard/impossible to put my point across to them, but if it was me I think I would like to be told if what I was doing was dangerous. Quite aside from the possibility that they might be putting the seat in the wrong way round - or is it possible that the seat is suitable to face both ways? It would be easier for me to write a note to them about it - I'm better at writing than speaking as I get more time, and is no issue with my appalling accent, but I'm worried that comes across worse than having a friendly word.
I'm not in the UK, I'm in Germany - I don't know about car seat laws here, as we don't have a car, but I'm worried about the little girl.