I have three niblings (2 nephews, 1 niece). Each one is getting a flashlight and a tiny Nitecore whistles when they get to a certain birthday, not sure which age yet. I know their parents would never forgive me if I gave them the whistles now.
The power was off for a little over two days, so we used our flashlights and other lights a lot. It really doesn't take much money to prepare. A lot of the gooseneck lamps these days use USB, so you can combine a lamp and a power bank to create a task light away from the backup battery.