So far, we're keeping it as 'mess-free' as possible 🙂
We've done a few simple ones - colours separating on litmus paper, hot coloured water in a glass dropped into cold water (like a water volcano)... keeping things very simple.
And there's no way I'm keeping acid in the house with kids around!
Ah, it depends on age and comprehension... I've always tried to teach the correct way to deal with such things. Better that way than uncontrolled...
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