all I can think of is to buy a huge whiteboard and mount it to the wall...
white paint, and plexy glass!
They sell dry erase white board at Home Depot and Lowes. It works the same as a regular whiteboard. You can buy multiple pieces to get the impact you want. If you want to make it look better, you can always frame it out with molding.
They also have dry erase paint as well - http://www.lowes.com/pd_310129-15765-01026_0__?productId=3231528&Ntt=dry+erase&pl=1¤tURL=%3FNtt%3Ddry%2Berase&facetInfo=
white board paint does exist. my office wall was done with it, before I moved into this office. it's pretty awesome stuff. i have no idea how easily it is to paint over if you want to change it later.
My nephew/university student is staying with me for the summer. He purchased some good sized removable white board sheets that stick on the wall..it's out there...$ stores/Michael's. Good luck
Here you go....
If you want you could do a whole wall in this, but there would be seams.
Hi all. Sorry I've been so late posting this thank you for your suggestions. I was waiting for some great reveal pics from my cousin but it looks like they're not coming :( I can tell you the ideas from Becky & Urban Cottage were the winners. We used white board panels from Home Depot and mounted them to the wall. Sorry I don't have photos to share but it turned out great! Thank you all for your help.