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Create invisible ink with lemon juice can be fun, here is the link with information http://www.sciencekids.co.nz/experiments/invisibleink.html

by Arthur

It looks like a very interesting idea! How about preparing one set and getting your classmate to... more

by Sunny Goh

We can explore how to make it safe w.r.t. the heating part.

Sure, I will bring a sample on Tuesday. As for the safety, the heating is in front of a light bulb.

by Arthur

3

Vote

Adiv

Sunny Goh

yu heng

by Arthur

1

Vote

Adiv

is to test the pH level with purple cabbage juice and lemon juice and the purple cabbage juice turn red

by yu heng

0

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