I made the background of my postcard sometime last year using Gelatos and a PaperArtsy stencil. I used a baby wipe on the stencil to take away some of the Gelatos.
I put some orange Magic Colour Liquid Acrylic at the top of the card and sprayed with water so that it ran down the card, when this was dry I turned the card upside down and did the same with green Magic Colour. I used a pen to outline the leaves. I stamped the PaperArtsy tulip onto card and coloured it with pencils and felt tips, I cut it out and went round the edges with black ink and glued it to the postcard, then I stamped the word tulip.
Have a good day