The famous Syma S107 was just upgraded with 2.4 Ghz remote system 1 key take off and landing and altitude hold.
It is one of the best helicopter sold EVER. 10s of millions of them were sold and are still selling 8 years later. Now these new options give it a new life.
Watch Youtube video for upgrades that allow for longer flight time by changing the battery to a "pluggable" battery so flight time is now limited to the number of batteries you have.
Comes in 2 colors Red and Yellow