They were selling old bowling pins at the bowling alley a couple of years ago.  We bought a couple because Hey!, bowling pins!.  The kids kept them in their rooms for awhile and then they went to the garage but during this weekend's garage sale, they reappeared.

I nabbed one and put it through my bandsaw because I've always wondered what was inside them.  Answer:  wood. 

Now the reader may well say:  "I could have told you that." but I respond "well, why didn't you?  If you had I could have made another 10 cents!"