Hello! The idea was to do a Tello review with my friend's son but a dead battery caused us to switch to plan B. I let him fly my Spark instead. Jaden is 11 years old and I was really impressed how well he did flying the Spark for the very first time. A total pro!
Good idea probably to pick up more batteries, although it would be nice to have an additional charger whereby currently you need to idle the Tello to charge a battery.