I am not going to post every thing that we are doing for our Alphabet Summer, but here are a few thing we have done. This might spark some ideas for you.
We kept the letter I just the same. It is one of my kids favorites, so we did nothing different. Here is a peak at the fun day we had:
Indoor Smores, and Indoor Campout
I tried to let Isaac sleep with the kids, but that didn't work so well. So after 1 1/2 hours of fighting with him, he went back to his crib. How will I ever move him to a big boy bed? That step is right around the corner. I have a feeling I am in for sleepless nights, and struggles at nap time.
We Painted Pottery.
We went to this neat little store. The kids got to pick out something to paint, their color choice, and then paint it however they choose. We left it there for about it week while they fired it. Then... we gave them to Dad for Father's Day. He loved it.
I hope this helps you find ways to incorporate learning into your summer.