No, I'm not a grandparent--not yet. (Though if the bizarre popping noise my knees make when I climb my stairs is any indication, an invitation from AARP should be arriving any day.)
I've mentioned that my parents have recently moved to our city. It has been absolutely delightful, and my children have eagerly set up shop at their House of Endless Chewing Gum. And my parents, knowing that there would be a steady stream of Dryer kids funneling through, had the good sense to turn one of their bedrooms into a "grandkids room". It's still a bedroom, but it contains my old dollhouse and my brothers' old Star Wars toys, with a few new things thrown in.
But the most brilliant thing about it is an idea my mom implemented. She actually told me I had to share this with all of you because she says "it's the only good idea" she's ever come up with. Which doesn't say a whole lot about what she thought of giving birth to me, but as long as she continues to provide free babysitting, I can get over it.
Anyhoo, my parents' six grandkids are regularly coming to their house and leaving a trail of drawings, and there's only so much one refrigerator door can hold, even a grandmother's. So my mom bought six bulletin boards, one for each grandchild, and she painted the frames bright red. Then for each grandchild she bought one of those unfinished wood initals you can buy at any craft store. (Thankfully, each grandchild has a different first initial, which makes it easy.)
She painted each intial and has attached it to its own bulletin board, and all six of them line the walls. Now when grandkids come over and draw another "treasure", there's a place to put them. And the kids are all thrilled that their creations are being used to decorate the room. (I know it would really work for you if I'd include a picture, but that would've required forethought and planning, and I'm all out of that these days. Sorry!)