What do you (personally) use for virtual stock trading?

I think I may get into forex and commodities and others in the future but for right now I just want to find one to trade stocks virtually, to experiment before I do it for real. I tried tradestation  but they require you to fund your account with 2K of real cash before you can even virtually trade. I tried google, but many of them are games competing with other people- I just want to do it for me. I tried I think it was TD ameritrade, but they require you give them personal information like where you work.

Anywhere you can do it for free, preferrably just with a sign up, that requires as little personal information as possible, and you can experiment with any amount of money? I want to try first starting with $2500 and see what I can turn it into, but do also want to experiment with higher amounts.