Toys and models are ever-reliable subjects for a quick drawing. You can arrange them how you like, getting a range of angles rarely available in the real world. They’ve also removed any unnecessary details, doing most of the simplification needed for a sketch!
Lexington grey in water-brush and fountain pen, water-colour, A5 –
Mostly drawing 
wow….ponch and chips look great! but the airplanes make a fabulous pattern….consider submitting to a pattern company?
Ha! Ponch, well remembered! I’ve never thought of the sketches as patterns, I guess they need to tessellate in some way? Ed