Hi there! I am hoping for some help from those of you that are better at these types of things than I am

I would love to do something like this (
http://www.centsationalgirl.com/2013/02/lego-meets-lack/) for my kiddos but would prefer to use the old coffee table I already have (44 " x 24"). The surface is pretty scratched so I definitely need to cover it, but the Lego baseplates are 10" x 10". Any other ideas for something cute and easy to cover the top? Thanks in advance!!