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K**R
A nice looking clock you can keep
The experiment is straightforward. I did it with my 9 and 11 year olds. The clock has a battery option for when you run out of fluid. We did it twice, the second time with vinegar, but after that the zinc became too corroded.
A**R
Five Stars
it is sick!!!
Trustpilot
1 month ago
1 month ago