Let's have some fun. There are many different things you can use to paint watercolour here are just a few.

no brush
 
 

craft knife for scratching out tree trunks

paper towel for foliage

soft cloth for wiping across the sky

sponge for textures

toothbrush sweep down with 1 stroke from wet paint

dropper for adding paint and for drawing

Plastic bubble wrap for textures

 
 no brush sky    no brush 2  

Paint a rough sky witha piece of cloth and cobalt

DRY

 

Paint trees with plastic bubble wrap and sponges, use

bold strokes

 
 no brush final  

Load up a toothbrush and make 1 sweep downwards

Scratch ot tree trunks with a craft knife and more

trunks with a pinted stick or a glass dropper