ATC (artist trading cards) are the same size as baseball cards. they are small works of original art that artist trade with one another. they are fun and quick to make. i thought it would be nice to make a valentine ATC everyday until valentine's day. collages are a blast to put together. i just look around me for bits of paper and other elements to create with (kinda like making a bird's nest - well, only flat). once i decide on the composition i paste things down on the right sized card (2.5" x 3.5") and add a sweetheart sentiment.