Mama called

On my stroll thro'  the narrow streets of town (the Jewish Qaurter behind the Venetian harbour) I found this unfinished drawing and unfinished cookie + pencil... I bet mama called the kid and it ran off from its work immediately. A drawing from a young boy or from a girl?!  Coz of the tank, I suppose it's from a boy, on the other hand I think girls more easily make a drawing... really I don't know who's the designer