What to do with tv lenses

I scraped the next tv jp from a tube and found three lenses and wondrring what to do with them.
Any help Will be appriciated.

If they are the red green blue ones there might be a use for them in stage lighting or someone looking to do something with them. I dont think they would bring much though. Maybe $10 for all 3.

I read somewhere that you can make a cheapo projection Tv using the lens & a small CRT tv.

You have probably allready figured it out before you read to this part.:)

(I put the first smiley in by mistake & can't remove it.)

Let the kids play with them. They'll have fun for hours.