a lineup of five young boys, one is holding a soccer ball, they are smiling; this was initially an illustration for a math-puzzle so two boys are of equal hight and all others have their own height respectively 男生n球 Ball、ball、colour、five young boys、four different sizes、Fussball、fünf Jungs、Jungen、Jungs、Lächeln、lächeln、Reihe、smiles、soccer ball、Stil von Hand、Strichzeichnung、style hand drawn、verschiedene Größen 球、球、顏色、五個小男孩、四種不同的尺寸、足球、五個傢伙、年輕、男孩、微笑、微笑、行、笑容、足球、手工風格、線描、風格手繪、不同的尺寸 資料來源:openclipart ( https://openclipart.org/ )