This small (about 150 mm high) table lamp would make a good child's nightlight. It uses a remote controlled LED that can change colors, change brightness, and turn on and off. Here is the LED unit:

It requires 3 AAA batteries.

The LED unit fits inside the lamp and can be easily removed. The lamp printed in slightly less than 13 hours using a layer height of 0.200 mm. I used white PLA filament, but clear is also a good choice. Other colors work OK, but they do affect the colors of the LED unit.