Seal them all into your garage floor somehow. That would look amazing. Just don't ever try and move.
Should I fund them first? A hologram floor would be sweet.
What about doing something like this in a public setting? Could you use them in building some steps or something functional at a park? You could probably raise money to pay for it.
Otherwise, you could donate them to an art program at a local college that will surely make something out of them.