Free shipping for a category

Hi.
Could I put free shipping only for all items into a category, now I have table rate shipping and is working fine but I need for some items free shipping because its price has shipping cost included.
I was looking for this and did not find.
Thanks.

What do you want to happen if an order contains items from that category as well as others ?

If an order contains items from that category as well as others, for the items from free shipping category no delivery cost calculated but for the others items apply table rate shipping.
I need this option because I'm going to put new small items.
With the big ones it is working fine if your order is below 120 € you pay delivery then if I put small items its price is always below 120 € and the shipping cost would be bigger than the item price.
Thanks and I beg your pardon because my english.

Have you set those products to Always Free Shipping when you create/edit them in admin ?

Thank you very much Stevesh.
That way could be the solution if everyone wants shipping but what about if somebody decides to pick up in store?
How to apply some discount?