Paper Wallets!

One of the misnomers about bitcoin is that it cannot be in physical form.  While it is true that bitcoin is purely digital there are convenient and easy ways to store bitcoin "offline" so to speak in a actual piece of paper with the corresponding private and public keys embedded in the QR codes.  Its a real fun and interesting way to get familiar with encryption and how bitcoin works but warning only start by using a small amount of bitcoin, say a dollars worth to familiarize yourself with it.  Here is an article to get you started, but you can also find many other resources online: Paper Wallets!