TBH I don't see what the fuss is about not being able to stand, the seat gives you a guaranteed amount of space (ok some grounds are worse than others but still), you can also get your 'spot' with a seat more often than not particularly if you're a season ticket holder.
Standing is not much cop for kids, especially so if it's packed and IMHO I still think it isn't ideal from a safety POV. Sure if they're standing at the front but then they are at such a low level it's hard for them to see everything as you're already that much further away from the action at the ends.
I loved standing BITD and when I started going on my own to the Boulevard at the age of 9 I'd stand right at the front on a bit of wall pretty much right next to the speedway gates. I went into threpenny a few times when I was older but it wasn't ideal unless you stood near the front from a viewing POV.