Today is Science Day!!

The color of the bronze statue
has changed a lot...

Everybody is wondering
how to clean the bronze coins...

"Hmmmm. I think it`s going to be...."

"Let`s put some coins
into the 3 different solutions."

Now, leave them in for a while...

What`s going on?...

"Look, the one in the vinegar
and salt is getting cleaner!!"

Brushing the coins.

"That`s really clean!!"

"We thought the soap would clean it! "

"See, It`s all bright and shiny!!"
"We all had a lot of fun!!"