ibook g4 stuck on disc 2

Hello,

I purchsed two Ibook G4 for my young children to use and I need help. When I turn them both on they boot up to a screen that says please insert disc 2 to continue the Mac OS install. I spoke with the person that sold them to me and he said that the drives had been wiped and that he was trying to install OS 10.4 and could not get the system to access the second disc. I have Mac OS 10.3 on CD and would like to install it on both systems but I can not get the systems out of this disc 2 thing and it is driving me crazy. I cant not afford to purchase 10.4 and both systems only have CD drives in them. I know they are old systems but for young kids it is a great start and hey Apple is Apple ---One amazing company!! Any help would be great. I have tried all the boot key shortcuts and the only thing that comes up is the hard drive and I cant get passed this.

Thank you all for your time

Bill