Acorns is an investment service that allows you to invest small or large amounts of your extra money in a portfolio of exchange traded funds. It's easy to get started. Just create an Acorns account and link it to your PayPal account. Acorns will recommnend a diversified portfolio, based on information such as age, investment goals, and income - all with no minimums and no commissions. Once you're set up, you can view your Acorns account balance information and add to or withdraw money from your Acorns account.