I get to have extra fun with Mother's Day, since we try to do something thoughtful for our kids' birthmoms as well as all the grandmas. Our family has a special love for comics...well, mostly Calvin and Hobbes. So a couple years ago I came up with these comics cards. I used photoshop to do all the captions, but if you don't have Photoshop or something similar, you could always use a free website like Picnik. The garden/flower theme was perfect because Little Brother's birthmom especially likes to garden. We just replaced the references to "birthmom" to "Grandma" for the grandma cards.
It would be hard to read them as one image since they were long and skinny, so I've included the individual pictures and you can see how the whole thing turned out at the bottom.
I'll be linking to: