Have you looked at the Martha Stewart : Crafts line at Michael's? If not, it's a great stop for stocking up on some summer craft supplies. From tools to tags to wrapping paper, this line is beautiful and practical for all ages.
I love the stickers shown below. Simple and whimsical and perfect for summer memories, I'll use these and so will my kids. They're just the right thing for making collages for grandparents, for labeling pictures they've drawn, or decorating packages for birthday parties.