From because the smell would disappear after a short airing: I have the parts of the game mat designed in a very large room for over a week for airing, airing the room regularly while the whole room stinks every morning by rubber / plastic. I would love to return the product, but first, a complaint was rejected because - and I quote ". Smell is own feeling and not a reason for complaint" and secondly, cost me the return shipping (by AT to DE) ca. EUR 16, -, which is probably not available at a price of EUR 19.90 for it. So if your child this smell (supposedly harmless) do not want to expose, should leave it alone! In short: For me, a waste of money!