Plywood top

At the weekend when I was shopping for new plants in the hardware shop I also picked up some plywood as the grain in the wood was really beautiful and had a great colour. The plan is to have it cut perfectly to size and put on my unit that sits in the living room. For just now its just sitting on the top and still to be fixed into place with some small bits sitting on top.  I just need to think of something that will secure it, but when I get bored of it I can take it off easily with no marks.