Savings Bonds are a great way to save money regardless of the state of the economy. The money earns a percentage of interest for a period of time, and the rates change twice a year--in May and November. Current rates can be found by visiting the U.S. Treasury website. Bonds can be purchased in the following amounts: $50, $75, $100, $200, $500, $1,000, $5,000 and $10,000. Read Basic Information about US Savings Bonds if you want to find out more about how they work.