I've used some of my handmade shavinffoam cards, kraft paper, vellu, tissue and metallic card as well as some selfadhesive glitter funfoam.
I've die cut balloons with the Paper Smooches die balloons, I've used the same throughout as I thought the difference in texture and pattern would be busy enough.
for the background I sued a piece of watercolor paper I've sponged and distressed with Distress inks to mimic the sky.
the sentiment is from Simon Says Stamp Birthday Balloons.
I've also used purple tissue paper to color some watercolor paper.
See how I made the shavingfoam cards, here
For more information on the Simon Says Stamp Monday Challenge, see this