Hey, needateacher. I dehydrate the pure tea spent leaves and use them in several variations of hand-made paper creation. I use this paper for many art projects. But one of my favourites is to use the paper to cover recycled tea tins that I then fill with herbal 'teas' I've foraged (labrador tea, rose hip, mossberry, cranberry, etc). I give these tins as gifts.
I also use them once in a while as decoration on masks I make.
If I use tisanes or genmaicha or the like, I compost them after use.
I've never tried eating them as others have...that's up next.