As a 6 or 7 year old, eons ago,I had no idea where to buy canvas in Brownsville, Brooklyn, so I figured the shade off of our bedroom window (in back of the Candy Store) was close enough. Surprisingly, my mother didn't go crazy when I ruined the shade.
PS–The paints I used were old, discarded Paint-by-Number oils in those little plastic containers.
and snow usually was grey-brown.
Can you find the seagull?