I confess that I find these to be a lot of work for me, so I tend to avoid them. (Where's the bag-over-head smiley?) My kids are constantly reading for 15 minutes here, another 15 there, 20 here, 10 there...ugh. I don't want to track that, and they aren't really going to. Plus our library's prizes suck (like, bookmarks and pencils). DD did do it once in an organized way and got her picture on the "super reader" board, which she liked.