Picture of 5 Great Lemon Tricks
Usually used for making lemonade, lemons have many uses besides food. With a bag of lemons around the house, you can some up with some cool projects!

Here are 5 of the most interesting i found, if you have more link to them in the comments!
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Step 1: Mold Removal

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You can remove mold by rubbing lemon juice where you see it. Mold should dissipate soon after!

Step 2: Invisible Ink

Picture of Invisible Ink
You can make your own secret spy invisible ink with lemon juice.

Take a q-tip and soak it in lemon juice. Use the Q-tip to write on the paper. Once the lemon juice is dry you can use heat from a lamp to reveal a secret message!

Step 3: Boost Laundry Detergent

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Use 1 cup of lemon juice in your wash to boost the effectiveness of your laundry detergent.

Step 4: Blonde Highlights

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Use lemon juice to get blond highlights, just apply and then sit out side. Repeat the process over a weeks time for best results.

Step 5: Electric Lemon

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Lemons can give you electricity! 

1. roll the lemon to get the juices
2. Cut 2 slits in the lemon
3. in one slit place a dime, the other use a penny.
4. Now you have electricity from a lemon, you can test how much with a multimeter.
You can also use 3 lemons in 1L (1000cc) of water to produce a stop bath when developing photo films and prints ;)
Shiftlock4 years ago
I don't know if it matters, but pennies dated before 1982 are all copper, and pennies dated after 1982 are copper-coated zinc. Pennies with a date of 1982 can be either, I believe.

Would be interesting to try this with a pre-1982 penny and a post-1982 penny, and see if there's a noticeable voltage difference. Also to try nickels and quarters instead of a dime.