Joint Compound that you can get at local hardware store and various stuff to stamp and press into it.
I started with a 6x6 canvas that was prepped with gesso and layered a thin layer of joint compound on it. I then took various stamping materials to press into it. The dotted lines under the hearts is from a hair comb and the flower motif is from a scrapbook border (paper card stock) that gave a good impression. The rest are stamps.
After you get the stamping done, let it dry out for 48+ hours. Since it was on canvas it seem to dry a little slower, maybe I had it on too thick in some places. After it's dry, I put on a clear coat of acrylic spray. Then painted the base coat with fluid acrylic yellow, let dry, spray with clear acrylic, and then added the next color, wiped off areas where I wanted the yellow to show through and repeated the process.
Sharing what's on the easel, this one almost ended up as scrap. I began this a couple months ago and had a clear direction of where I was going with it but then I got some "advice" on what would look better.... and then it went way south from there.
Anyway, it sat around for awhile before I said "whatever!" it'll be whatever it will be, so I threw some pastels on it and added more watercolor to it and here we are. There still a few tweaks I want to do to it but I'm happy that it didn't end up as scrap.
So moral of the story is don't ask for directions when you already know where your going. :)