Yes i always made up treat bags for my daughters birthday parties, i would usually put in a balloon, some sweets, some stickers and a bangle or two,or little ring, i tried to keep the expense down as our budget was limited, but yes one can get carried away,especially as you think you have finished the treat bag, and then you see something and think oh that would be just great in the bag.

And we always played pass the parcel too, we used to make sure every child got a lollipop and then a small gift for the main winner at the end,seemed to work out quite well.