This month's One-Layer Simplicity challenge is to use repetition on your card. I just got this Yellow Owl Workshop set of two balloons (only one used here - the other says birthday). It has a childlike feel to it so I used bright basic colours (I see that some of my inkpads need to be reinked!) and then used a sharpie to draw the strings down to the Hero Arts 'birthday'. I chose the Sharpie because it is about the same thickness as the font of the black sentiment. I think that thinner strings would cause the card to look unbalanced. Another design tip - I notice when I'm overlapping inks like this, yellow can very quickly disappear underneath the other darker colours (see where it overlaps with the green? No? Exactly my point!), so I usually try to minimize the overlap so that it feels like there is an adequate amount of yellow in the design.
I'm also linking up to Less Is More 158 - One Layer Anything Goes.