Paper wallets are a piece of paper with a public address and the private address printed on them.

You can use the public address to send any amount of bitcoins. You can then save the piece of paper as it also contains the private key which can be used to transfer/spend bitcoins or sweep the Bitcoin paper wallet completely to another wallet.

Since the keys are offline, printed and secured by the owner, there is no threat of any electronic damage to bitcoins unless the printed keys are lost.