I make my own iced tea- literally leaf tea and water- no sugar flavourings or anything else added. I tend to use green tea as it's less caffeinated and I drink quite a bit of it when it's hot.
The other day kiddies (4 and 21 months) caught me and I gave them a sip to try. They now clamour for it every time I reach for the fridge. Surely it's OK as a drink in moderation isn't it? There can't be more caffeine in green tea than there would be in a square of chocolate?