Unlock your door with a secret knock. More information, source and schematics at http://grathio.com

Next time, don’t throw your ink cartridge when it says it’s empty. Just reset the cartridge!

Listen to conversations over long distances with a homemade laser listening device. All you’ll need is a laser pointer, tripod, old pair of headphones, photocell and a recording device. Your completed laser spy microphone won’t be the most practical recording setup you’ve ever used, but it’s an interesting bit of science and a great DIY project. The process involves a simple bit of soldering, but in all it’s very simple.

1. Find a pair of scissors. The sharper the better. The scissors you have from kindergarten should be fine.

2 Score some rubbing alcohol. Take a few shots.

3. Ask yourself, “Do I really want elf ears?” If the answer is no, repeat step 2, possibly alternating shots and bong hits.

4. Cut a triangular chunk out of your upper ear. You should be bleeding at this point.

5. Sterilize a needle with a lighter, thread with fishing line or yarn, and sew your ear back together in the desired shape.

6. Put some tape around your ear to hold it together and prevent strain on the stitches.

7. Repeat steps 4 through 6 for the other ear.

8. Take a picture, preferably topless.

9. If you are a chick, send me that picture. If you are a dude, throw it away, I don’t care about your elf ears.

10. If you are hot, I will marry you.

11. Change your name to Zelda.

[VIA]