I was cleaning out my car yesterday and found [this balloon](https://imgur.com/a/xK98QRw) from a month ago that was somehow still mostly inflated. Then I brought it inside for my kids to play with and by this morning it had deflated to about ¼ of it’s previous size. Shouldn’t it have gotten bigger as heat makes things expand?
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Did you wait for the air in the ballon to warm up?
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