Finding Hints

I don't know if there is a set amount of hint in each scene. I found up to 3 (different kinds) in one scene. They are: magnifying glasses, field glasses and clocks. I think the field glasses can find multipul items. Have not tried it yet. I asume the clock gives extra time. The Magnifying glass finds one item. All of them are on a white shield shape, about the size of the guppy circle next to my name.
Hope this helps someone.