Robin's Nested

Yesterday was our first clear day so we had started to pull the shed out. We are very lucky to have this beautiful little family make its nest head hight in our shed on some tools. 2 Robin's are in and out of an open window feeding constantly. They kept their distance whilst we worked around them not disturbing the nest and they have both been back throughout the day and this morning feeding the little ones. We are not going to be using the shed often so they have their space but my question is would you leave some food for them, mealworms etc or leave them to it. I don't want to leave a feeder outside of the shed as I didn't want to attract other birds but thought about putting a dish of tasty treats on the side in the shed? Any ideas?