Stocks with dividend reinvestment plans: Dividend stocks are a great way to earn compound interest. 

Companies that pay dividends often offer dividend reinvestment plans (DRIPs), which allow you to reinvest your dividends back into the stock.  

Over time, this can lead to significant growth as your investment compounds. 

Additionally, many companies offer DRIPs with no commission or fees, making them a cost-effective investment option. 

Mutual funds with long-term performance track records: Mutual funds are a great way to diversify your portfolio and earn compound interest. 

Look for funds with a long-term track record of performance and a low expense ratio. 

This will help ensure that you are getting the best returns possible while keeping fees low.