Write a secret message with invisible ink using these simple household items.
◀
▶
-
1How To Make Your Own Glow-in-the-Dark Art
2:02 -
2How To Make Potions
1:21 -
3How To Build an Erupting Volcano
1:36 -
4How To Make a Simple Lava Lamp At Home
1:50 -
5How To Make an Ant Farm
2:45 -
6How to Make a Balloon-Powered Car
1:50 -
7How To Make an Easy Science Project
1:15 -
8How to Make a Spectroscope
2:26 -
9How to Make a Simple Electric Motor
2:27 -
10How to Make a Hamster-Powered Night Light
2:31 -
11How to Balance a Broom on Your Body
1:42 -
12How to Make a Water Wheel
2:46 -
13How to Make a Weather Barometer
1:42 -
14How to Make a Wind Vane
2:03 -
15How to Make a Rain Gauge
1:28 -
16How to Make a Solar Hot Dog Cooker
2:07 -
17How to Make a Film Canister Rocket
2:19 -
18How To Make Disappearing Ink
1:43 -
19How To Turn Water Into Wine
1:40 -
20How To Plan an Award-Winning Science Project
1:46 -
21How To Make 3-D Glasses
1:37 -
22How To Hide Speakers With Old Books
2:09 -
23How To Balance an Egg on the Vernal and Autumnal Equinox
1:11 -
24How To Build a Go-Kart
1:46 -
25How To Transform a Room Into a Camera Obscura
2:22 -
26How To Turn Water Into Ice Without a Freezer
0:54 -
27How To Turn a Mint Tin Into a Mini Speaker
1:35 -
28How To Make a TV Remote Jammer
3:22 -
29How To Make a Potato Powered Calculator
1:24 -
30How To Power an LED With Lemons
2:40 -
Now Playing
31How To Make Invisible Ink
1:04 -
32How To Grow a Crystal Garden
1:22 -
33How To Make a Solar Charging Bag
2:48 -
34How To Make a Marshmallow Gun
2:09 -
35How To Make a Fog Machine With a Household Iron
3:23 -
36How To Get an Egg Through a Bottleneck
1:00 -
37How To Make a USB Fan
2:27 -
38How To Dust For Fingerprints
1:33 -
39How To Build a Mini Hovercraft
1:34 -
40How To Make an LED Floatie
1:25 -
41How To Make a Metal Detector
2:06 -
42How To Make a Coin Battery
2:00 -
43How To Build a Laser Security System
4:03 -
44How To Build a Giant Floor Mat Nintendo Controller
2:36 -
45How To Make a Clockwork Orange
1:21 -
46How To Create a Baby-Headed Dancing Frog
2:10 -
47How To Make a Trip Wire Alarm
2:36 -
48How To Make a Water Gun Alarm Clock
1:48 -
49How to Make a Beer Can Cooler that Runs on Solar Power
3:06 -
50How To Understand Time Travel
2:58 -
51How to Make Magnetic Fluid
1:43
You Will Need
- Lemon juice
- A bowl
- A cotton swab
- White paper
- A light source with a 100-watt light bulb
- Milk (optional)
- Vinegar (optional)
- Orange juice (optional)
- Paintbrush (optional)
- Toothpick (optional)
-
Step 1
Put lemon juice in bowl
Put the lemon juice in a bowl and dip your cotton swab in the lemon juice.
-
Tip
Using milk, vinegar, or orange juice instead of lemon juice will have the same effect.
-
Step 2
Write your message
Write your secret message on the paper with your cotton swab and let the writing dry completely. The message will be invisible when the message dries.
-
Tip
You can use a paintbrush or a toothpick instead of a cotton swab.
-
Step 3
Heat the paper
Hold the paper near the light bulb to expose it to the heat, but don’t rest the paper on the bulb.
-
Step 4
Message appears
Watch in amazement as the message magically appears. The words will appear in a tan or brown color.
-
Fact
Did you know? Arizona and California produce 95 percent of the U.S. lemon crop.
