What subject do the kids study?
chemistry
How many kids are there?
Three
What are their names?
Li Weichi, Huang Runling, and Xiao Yan
Are they in school?
Yes
Which one do they attend?
Zhongshan Huaqiao Middle School
Where is that at?
Guangdong
What chemist are they challenging?
Robert Boyle
What did he discover?
the use of litmus paper
How long ago was that?
over 300 years ago
What might replace the litmus paper?
mixed pigments with acid and base