Lo can sit up on his own now and is starting to try and crawl. we have tiled floors and theres just nothing soft about them. i've been looking into getting a decent sized play mat but holy crap are they expensive. we'll be getting a play pen soon and i wanted to make sure the floor was soft enough. i've tried blankets but i'd have to use a shit ton of them. any ideas where i can get a decent sized play mat for a good price? i've checked ebay, amazon, craigslist, target and walmart.