|
Fingerprints
- easy science projects for kids |
Your children can play the detective by identifing fingerprints
around the house
Stamp
pad
Cornflour
Small soft paint brush
Magnifying glass
| 1. |
Fingerprint
all the family by pressing their index finger on the stamp pad
and then taking a print on a piece of a paper. |
| 2. |
Label
each print. |
| 3. |
The
children can now look for fingerprints all over the house. |
| 4. |
On
locating one, they can highly dust it with cornflour, using
the brush. |
| 5. |
The
excess cornflour needs to be blown away carefully. |
| 6.
|
The
fingerprint would be now visible. They can use a magnifying
glass to clearly see the print and then identify who it belongs
to. |
The
homemade magnifying glass can be useful in this activity.
Method
1
Lemon
juice
Paper
Paintbrush
| 1. |
Using
the lemon juice & paintbrush write your message on the paper. |
| 2. |
Nothing
will be visible. The secret message is ready. |
| 3.
|
To
read the message hold the paper near a hot light bulb or use
an iron on the paper. |
Tip
- a Cotton bud may be easier to use than the paintbrush.
When
vinegar or the juice of some fruits and vegetables dries on paper,
it leaves no stain, but when the paper is heated a stain appears.
| Safety
tip - Be
careful while using a heat source such as a light bulb or iron. |
Method
2
Paper
White candle
Paint
Paintbrush
| 1. |
Using
the candle to write on the paper. |
| 2. |
To
decipher the secret code, paint over the paper with a wash of
watercolour paint. |
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