This is our first time flying with kids. Do the airlines have any type of special seatbelt attachment for kids (2 and 3 yrs old) or do they fit ok in the regular seatbelts? I'm afraid they're going to be too loose for them, although I am fairly sure they slide to adjust, right? Just wondering if there is anything special we need for them to sit without car seats. THANKS!

I would think it has more to do with weight than height, myself. But as I said - we have never flown with kids so this is all new to me.