Pumpkin-Sky Lamp

My idea is to create a pumpkin lamp.
The lamp consist on 3 small pumpkins that interact with each other and they also respond to it’s environment using the motion sensor and the photocell.

The one in the middle will have little holes, like the sky, with blue LED’s inside, and will light as knight rider when the photocell is activated. It’ll also have a motion sensor which will respond lighting the RGB lights that are inside the other two pumpkins, changing colors.

The most challenging part will be to  solder everything because I’ve never done it before.
And the most interesting and fun part so far, has been to make the photocell work and react to the changes of light intensity inside the room.