Step 1: Tree Building Components
Step 3: Solar Lights
I got 6 boxes of solar powered lights at Rite Aid for $15 each. They charge during the day and light at night. They have sets with multi-colored LEDs or white LEDs. Each box comes with a stake, an extension for the stake, a clip, a solar panel, and a string of LEDs. The LEDs fit into the 1/4 inch holes in knex connectors. I would recommend putting the solar panels outside, they will work better.