This was a drawing of a simple frog in a book for beginning artists from the 1890s, it's a simple frog, but I find it peaceful.<br/>簡單的青蛙<br/>amphibian、drawing、figures、frog、Non fiction、simple、sketch<br/>兩棲動物、畫畫、數據、青蛙、非小說、簡單、草圖<br/>資料來源：openclipart ( https://openclipart.org/ )