Absorbing.

Armed with a paint-box, one cannot be bored, one cannot be left at a loose end, one cannot "have several days on one's hands." One must not be too ambitious. One cannot aspire to masterpieces. We may content ourselves with a joy ride in a paint box. And, for this, audacity is the only ticket.  Just to paint is great fun. The colors are lovely to look at and delicious to squeeze out. Matching them, however crudely, with what you see is fascinating and absolutely absorbing. 

Sir Winston Churchill, from Painting as a Pastime