Birthday slider card and Birthday Popup Balloon card

One of my most favorite things about card making is that they can be interactive for the recipient.  Today I have two such cards.  The first one is a slider card with a secret message behind the scalloped circle.  This is such a happy and festive card.

My next card took a little bit longer to make.  I had to attach each of the balloons on a piece of acetate.  This card fold flat for mailing and pops open when taken out of the envelope.