Maybe it's the material it's made of, too. Some of the bobble heads we have bought at disney (the ones of the sports figures (i.e. mickey golfing) that are darker looking) are made of clay and apparently the xray machines don't show them well. We have had to stop twice and they have unwrapped them to check them because they couldn't tell what it was on their monitor. The tech that was there said they must be clay as we can't see through taht well.