What can't you do with your iPhone or iPad these days? There are so many awesome apps out there. It's natural to download a bunch and give them a try.
It's the same with the easy-to-use camera. It's only natural to want to take a million photos and videos of the world around you.
While there's no limit to what you can do with your Apple gadget, there IS a limit to the amount of stuff you can store on your gadget. I've heard from a number of people who couldn't upgrade to iOS 7.1 because there wasn't enough room for the download.
If your gadget fills up, don't worry. Clearing out space isn't too hard if you know the steps, and I have step-by-step instructions.