How to learn to fly a drone:
Buy a small drone with its own remote control. This could be a JJRC H36 or FQ777-124 with soft plastic (safe) blades with blade protectors.
If the child is under 6, be careful. They tend to fly the drone into the ceiling - over and over again.
Give children a flying lesson with the drone turned off, hold the drone, and as they manipulate the controls, you simulate what it will do. That saves batteries and decreases crashes.
Use bed sheets or fabric curtains to create a safe flying zone, and recruit a “drone catcher” who knows how to pick up a drone and avoid the blades.
Buy an extra battery so you can continue practicing. You can then recharge the spare battery while the other one is in use.
Make sure you have large, clearly marked, take off and landing targets that are no more than 1.5 to 3m from one another. If you create this type of setting, your chances of success are far greater.
Here's to great flying.