Step 1: Things Needed
1) A firm and small box. cardboard and plastic recommended, and you can also decorate them.
2) Two LEDs. ( One with multi color and another one with white is purely recommended.)
3)battery(s). I always use my trustworthy 9v battery.
4) wires. to connect everything.
1) A small spring. It can be found even on clickable ballpoint pens.
2) A large bead for the weight above the spring
3) copper wire. (that is the wire without insulation.)
4) bendable steel wire.
1) sticky tape or duct tape,
3) sugru, or modelling clay
4) solid battery connecting plugs.
And now we're ready to go.