DIY Constellation Tile Coaster Tutorial from Almost Makes Perfect here. You can use the really cheap tiles from Lowes or Home Depot which I believe are around $.30.
DIY Felt Coaster Tutorial from Small Things with Love at Sugar Bee Crafts here. Really easy tutorial and I can see giving a pack of these with mugs as gifts for the holidays.
How cute are these?! I think I might have to make some for myself. Oh man, I bet they’d made awesome Christmas gifts too!
Truebluemeandyou: Love the French translation of these by Chrome: The Talkative Saucers. I don’t think there’s batting in between the layers - but I would put some in. Also I agree with skillzmcfly that these would make nice holiday gifts.