@SweetieJean
You can buy I bonds in electronic form through TreasuryDirect. The only difference is that you don't get a paper bond. Using your tax refund is the only way to get paper bonds, but the interest rate on the electronic bonds is the same. And the maximum amount you can buy each year is twice as much for the electronic bonds.
Series I Savings Bonds
Series I Savings Bonds more info
TreasuryDirect
