Hi VoidSpace, you definitely need to include gender. Ha. Many different necessities might crop up for boys vs. girls. I think some basics are: solar or an energy source; fridge; storage. You'll need clothes for whatever clime you want to visit, but seriously - the basics. You'll probably live in the same 2 pairs of trousers/shorts and 3 sweaters/tanks weekly. A good pair of shoes for walking. Basics for the kitchen: a knife that cuts; a breadboard; 2-4 plates; 2-4 cups; silverware to cover said plates; a pot and a pan; external water storage, like a container for emergencies; a bucket for toilet emergencies; good bedding that's cleanable; and any techie gear you need. Don't forget to have a small space set aside for your personal memorabilia. They carry you through dark days.
Any entertainment, store up. Whether it's books (a Kindle) or films/tv, store them up for bad weather days. Believe me, you'll thank me later. Ha. If you have any other questions or need specific advice, don't hesitate to contact us. We'll be more than happy to help.