My girlfriend had a few games left over from when she gave me her PS2. I tried playing Harry Potter And The Sorcerer's Stone for PS1, but the game had problems loading.
I moved on to Capcom Vs SNK Pro for PS1.
Also tried playing Corvette for PS2, but it was unreadable. Oh well.
The only working PS2 game was Frogger's Adventures: The Rescue which was decent.