[jQuery] Lightbox => 1 thumbnail to several images

Hello, all!

Brand new to JQuery, and I'm looking for a solution to my problem.

I have a page with, say, 30 thumbnail images. Currently, when one is
clicked, a larger version displays, and then you can back/next through all
30.

I have been tasked with making a change that doesn't seem difficult, but I
can't figure out a solution. I need to display the 30 thumbnails, but
instead of lightbox-ing a larger version of each thumbnail, I need the
thumbnail to display anywhere from 1-to-several larger versions for that
thumbnail. So, instead of scrolling through all 30, it will simply scroll
the through the few tied to that thumbnail.

Example:

Thumbnail #1
- Image #1a
- Image #2a
- Image #3a
- Image #4a

Thumbnail #2
- Image #1b
- Image #2b
- Image #3b

Thumbnail #3
- Image #1c
- Image #2c

etc.

So, when a user clicks on Thumbnail #1, it will display Image's #1a - #4a
and stop. Thumbnail #2 loads Image's #1b - #3b, etc.

I'm assuming I would have a hidden div that contains the children images.

I apologize if this has been discussed before. I could not, for the life
of me, find the answer.

TIA!

J