One: the simple reality, mishka, is that one has time to observe or one does not. But if you do, it's enjoyable, almost cosmic. I've done hundreds of hours.
So, some advice:
drab-coloured clothes, almost 'camo.' Binos. Cushion. A pocketful of 'trail mix' is good. Move into position as patiently and quietly as you can. The Cardinal Rule is: let them come to you.
I once observed a male with young chicks from a distance of no more than ten metres, and they never saw me: I was in position, hunkered down in a pile of gum 'litter.'
Two: kids gotta be kids: sitting still is tortuous. But if your kids are smart, explain to them -- the hunting blind was a fine idea!! -- that their chances of good observation are a million billion times greater is they can move v. quietly and v. slowly.
Three: I would not dismiss your 9-yr.-old's claim. There's This Thing, Mishka: observing emus without the presence of any actual emus -- and again, if you are uber patient, it's so soothing for the soul:
feathers in fences, footprints, poops; and vocalisations. Representing noises in language -- in Indonesian, dogs don't go 'woof,' they go 'gong gong' -- is notoriously difficult. But you tell your kid that Supreme Emu believes her. And your kids are entirely welcome to open a thread here, and post Notes.
And you can 'observe' a very great deal from vocalisations.
And the fun is: hmmm . . . vocalisations m o s t l y indicate more than one emu!! I look forward to your reports. Whatever, sit and listen, and identify all the woodland sounds you can. Grunts and 'foomphs' and purring are all emu sounds.
Four: the footprint is go!! Check the Net. An adult emu's footprint is a little smaller than a woman's hand. It has three talons: a larger central one, and two flanking that.
Five: observation on a pasture just next to the woods? Yup. That's exactly where you'd expect to get sightings -- and this takes us back to the patience thing, mishka: emooz got awesome sight and hearing, and they will 'recon' a pasture at length before they move from the cover into the open. So you do best to be in position -- they'll still see you! But if you are quiet and still, and other birds and critters are not alarmed, then they may come out and graze.
SE