Can I have multiple stores for a single site using "GridMarket" and "MarketPress&quot

I have “GridMarket” sub theme and the “MarketPress” plugin installed. I would like to have multiple store within one site for things like: fiber, yarn, animals for sale and classes. I setup the first store but I have not been able to build other stores or separate pages within the original store for the other things. Is there a way to do this? Are these the right theme/plugin combinations to do this?

I’m hoping that I can log into my site and them pick between the different stores that I offer as well to select my blog page. Is this possible?

Thanks in advance