No audio hardware/ waveform device msg

I'm trying to set up an older win98 machine for my daughter to play some games on (she's 4).

Problem is there is absolutely no way to get sounds. Speakers are hooked in properly.

I get messages say "no audio hardware" or "no waveform device" depending on what I try to do.

CDs won't even play within the computer, just nothing. MIDI doesn't work either.

Any suggestions ? What do I need to do to get it to work (it used to- I swear!)

No interenet access with that comp, but my computer does, so if that is involved I'll have to put stuff on a disc yo transfer.
Thanks!
GF