I'd love to be able to weigh the cooked broccoli or fresh strawberries etc that DS (two years 6 months) packs in to guage just how much of his five a day he's getting. The only thing I've found to date is that a portion, for anyone adult of child, is the size of the palm of your hand.
Would love something more scientific if anyone has it, ie pointers to a site or something that can tell you that it's 50 grams of cooked veg, and 60 or fresh, or similar.