After looking through my stamp collection - several times - I eventually settled on these circles and bubbles stamps to make this card:
The black bubbles are from Paper Artsy stamped in Versafine Onyx Black
Happy Birthday To You is Hero Arts C2656
They're such nice people at A Blog Named Hero - they picked out my card as one of 5 from the last challenge for special mention, and I get a Heroine blog badge. Yay!!
I'm also entering this card for Lawnscaping Challenge #36 - add a splash of colour