I used a tiny 2" x 3" canvas to keep it manageable (my day job beckoned), covering up something weird I painted a few years ago. I often paint and re-paint canvases. I like textured layers that make someone wonder what's under there.
I used paint from a previous project, sealed in an air-tight jar. I blobbed other colors straight from the bottle, and used small brushes to add some dots around it -- like stars.
It's not bad (nor is it profound), but I played it too safe and resourceful. I used materials leftover from other things -- things a waste-less someone should* use -- when what I actually wanted to do was finger paint.
I wanted to grab a fresh piece of paper and drag blues and greens across it and use a dried-up pen to write a good quote in the paint. I wanted to have to scrub my fingernails after.
Instead, I used a canvas (a figurative box, if you will) and paint I should* use before it got old and viscous. I traded Joy for Obligation, which isn't the aim of my #100daysofcreativeplay exercises at all. Somewhere around 12 years ago, I realized my art didn't need to be realism or in colored pencil (those rebellious college days) and I stumbled into the Joy of abstract acrylic painting.
I don't paint as much these days, since it takes some preparation -- the space, the materials, the clothes (I am not a tidy artist, nor should* I be). My intention with this project is to restore the Joy (Play) more often (Discipline). It needn't take hours, though it could. Moving forward, I intend to use what I want to use, welcoming creative freedom. I'm calling this one Soul Revival.