My philosophy of writing has always been that it should be fun, first and foremost. Before you get to be deep, philosophical, world-changing, or soul-searching, you have to make sure that your readers actually want to read what you scribbled out on the page. With this in mind, you'll find that, even when my writing isn't introspective, it will always be entertaining.
When it comes to writing for a younger audience, I stick by two points: 1) It's got to be clean-cut. I don't mind being exciting and I love action and adventure, but I'm not going to be graphically violent, use profanity, or have adult situations. 2) Defy the rules. If I ever kick myself over anything, it's that I didn't get even MORE outlandish. As long as a writer sticks by their own made-up sense of logic, it doesn't matter if it conforms to the rules of the real world. After all, if you wanted real, you'd pick up the newspaper.
That's all for now. I'll post some flash fiction next, and hope to have (as my darling wife and social media guru suggests) "Flash Fiction Fridays."