For my bag, I used one of the images from the Birthday Puppies Set. I didn't add additional items on the bag because I was afraid Gus would chew them off.
Bag: MPR Associates, Inc
Stamp: Bugaboo - Birthday Puppies Set
Sakura jelly glitter pen
Not just cards - Anything Goes
Allsorts - No patterned paper
Dragonfly Dreams - Anything Goes
2 Crafty Critter Crazies - Ch. 10