Hi, and welcome to Apple Support Communities.
Which exact iBook model is it?
You can choose from this list:
Which version of the operating system is it running now?
How much RAM is installed?
What kind of optical drive does it have? (CD-ROM, CD-RW, DVD, Combo, or SuperDrive?)
Is an AirPort Extreme Card installed so you have wireless access?
What you can do with it depends on the answer to these questions.