try https://suretrader.com/ it gives you $100k to paper trade. I haven't used it but I am almost sure that they will let you short

@lopez16 To me suretrader probably has the best demos because it actually shows you buying and selling shares little by little until your order is completed. Unlike TOS where it automatically buys once you come within .2 cents of the price

Interactive Brokers will work, but you need to open an 10K account. I could be wrong, but I think its a 15-20min market delay for their simulated trading.

Thanks for all information