Penny rug style

I love penny rugs (see www.flickr.com/groups/pennyrugs/) but I've never got round to actualy making one. It's yet another of those things on my mental to-do list that I never quite get aroun to. The closest I've come is this candle mat I made last year. It occurred to me recently that you could create a crochet version as it's easy to crochet circular pennies. The end result works rather well. And there are a whole lot of crochet shapes that would work really well in this way, so I have lots more ideas. Crocheted using 4 ply 100% cotton yarn and a 1.75mm hook.