Virtual Money
Virtual money is what you will be trading with in your demo account. Since virtual money is free, most brokers will provide you with a rather large amount of it that you can then trade freely until it probably eventually disappears.
Also, if you wish to practice trading more using your demo account, you will probably want to have an account with a larger initial amount of virtual money to play with. Amounts around $100,000 seem to be the norm for virtual money provided with demo accounts.
