Toy rocket, with USB lithium battery charger and LEDs

This is a toy rocket, in 3 parts. I wanted also to add some lights, so I found a "generic" USB lithium battery charger on ebay (see photo). This keeps a battery charged while a switch turns on/off the LEDs. To add the switch I drilled a hole on the side of the rocket; didnt have a switch at the time.

Note: The mid-section of the rocket, has 4 partial spheres sticking out. These spheres each have a 5mm hole (inside the rocket) for adding the LEDs.

Also, there is a USB slot, for the battery charger (under the rocket), and slots inside the base for retaining the battery charger PCB