The best thing about a DIY drone (from a gift perspective) is that there are always opportunities to expand capabilities, make modifications and customize. In other words, it is ripe for future gifts ideas.
One cool upgrade is the 3DR Radio Telemetry Kit, $74.99
What it Does
In addition to wireless control, you may want to get sensor data back to your ground station. This is called telemetry.
Why it’s Cool
Provides about 1 mile range, so you can transmit data to the ground. This radio can be interfaced to the ArduPilot via a serial connection. This opens up a whole new world of possibilities.