This project is basically free -- and can be done in 20 minutes.
Step 1: Comb the beach for some cool (fat) driftwood. AMAZINGLY I found this box of driftwood in alley by my house! Indeed trash to treasure :)
Step 1: Drill Into the Driftwood
Use a 1 1/2" drill bit to drill into the driftwood.
Step 2: Add Candles!
For safety reasons, make sure to only use candles with a metal casing, like the tea light shown above.
Light, and enjoy!