Thumbnails to Full Size

Can someone take a look at my site:

http://www.delicioushealthyfood.com

I used the iRecipe theme because of the automatic slide show on the home page. I have figured out that I have to choose “add thumbnail” for each post in order for them to appear on the home slide show.

However, I want to be able to have people click on the small thumbnail in each recipe post so they can see the bigger image.

I have looked at and added Picasa, WP Photos, NextGen, and others, but nothing seems to work.

I am not that good with code. 🙂

Any suggestions?

Thanks,

Sherry