Snag some brochures and try your hand at origami. In the lounge, you can make paper airplanes, and in the air, you can make little figures/objects. I can easily spend an hour folding a paper airplane, taking my time to ensure the folds are even and crisp, and that there is no built up stress that warps the wings.
A good set will come with wireless charging as well. I can charge my headphones on the back of my phone if I get desperate. Even better, each earbud has its own battery, and the case has its own battery, so if I ever get the low battery warning on my case, I just charge it while still using my earbuds without any issues.