There are dozens of drone available in market but none of them is like Axis VIDIUS because the title of being world’s smallest drone with built-in camera only goes to Axis VIDIUS. This mini drone measures only 4.3cm x 4.3cm x 2.5cm. Being in this size limits some features; for example 15mAh batter lasts for only 5-7 minutes of flight. But thankfully it takes only 20 minutes to recharge. Also the camera records at 420p resolution. The video cab be live stream at smartphones.
The Axis VIDIUS ($75) has 6-Axis Gyro Stabilization which you’ll not get in smaller drones. The drone can be controlled via both Android and iOS devices or by included 2.4 gHz controller. Obviously not a thing for grown up but you can buy one to make your kid happy.
https://www.youtube.com/watch?v=E-Lr-8BF1BY