Review on Tomzon A31 Mini RC Drones Toy for Kids - 7 Colors LED Light, 3 Speeds Adjustment, 3D Flips, Headless Mode, Altitude Hold, Remote Control, Gifts for Beginner Boys Girls - Includes 2 Batteries by Amanda Davis

I'm really surprised that none of the reviews I've read had anything about propellers. I bought it for my 7 year old grandson. He absolutely loved it! BUT. he used up spare propellers in two days. Now I've learned that you can't get more. The motor shaft of this drone is 1mm in diameter and the propellers are 2 inches. All 2 inch propellers are designed for 1.5mm shaft and use screws. Yes you can buy 40mm propellers but they are not big enough. I don't understand that I can't get extra propellers! I changed the rating to 3 stars after Tomzon offered me additional props. They are very expensive - $10 for 4, but for this drone to fly you must have these propellers. After changing the propellers I have to adjust the trim as all the pulling and pushing knocked them out of trim. This design would be much better if the stands were bolted on and easily swapped out. This is a fun drone and my 7 year old grandson loves it.