Just print off the address and key. If you wanted you could run them through a QR generator to make them easier to scan in but personally I find it's not that difficult to type in a private key once in a while.

For those that don't know you can open the debug console in the debug console of most coin wallets and type "dumpprivkey put-the-address-here" and it will give you the private key. Similarly you can type "importprivkey put-the-key-here" and it will import it.