You can see when an app is using your location by the small arrowhead on the top bar of your iPhone’s screen. It’s hard to know exactly which app or apps are accessing your location at any given time.
Have the arrowhead as a clickable object that when clicked, shows you which apps are currently accessing your location.
Learn about symbols and icons while having fun.
Have a game where you have to identify symbols and icons in a growing level of difficulty. Each level can have new symbols that are based (historically or visually) on previous level’s correctly identified symbols.
If you publish articles and posts on your own, you want to enhance them with an image, a photo or an icon. It’s tedious and time-consuming to search for the right image with the right license.
Have a search engine that takes text or a URL of a web page, and based on that text find you the right images with the right license (probably some version of Creative Commons.)