or, as I and a work colleague will be, you are going to use them to teach your children a bit about the cryptocurrency, then you might value them differently!
1. Plug in USB-Stick
2. Tell children that it mines Bitcoins now
3.
4. Children have learned the whole Bitcoin-Thingy
5. Profit!
There's more to it of course:
1. Setting up a PC / embedded system
2. Installing / managing a Linux system (under supervision of course)
3. Installing the mining software
4. Configuring and maintaining the whole system
5. Earn some pocket money for doing above