I created the sky background by coloring with my Zig Clean Markers on watercolor paper. I added dimension by cutting out the small balloon from the sky background. I put the small balloon on the base of the card and then used pop dots to raise the sky background. I used more pop dots to raise the large balloon. Then I tried something different with the balloon on the right. I happened to find a card by Sarah Little where she used Shrinky Dinks. So that's what I decided to do as well. I stamped the large balloon on Shrinky Dinks paper, colored & heated. It made the perfect balloon to add to my card.
Here's a side view of the card so you can see the different dimensions.