We also use My Father's World preschool; they have a fantastic idea booklet that comes with their preschool package and offers some challenging and fun ideas. Handwriting Without Tears looks great, I bought the workbook and teachers book but haven't started using it yet. I still want to make the wooden pieces that they use to form letters- in the teachers book they give you a pattern. We've also done Before Five In a Row along with lapbooking from here.
I hope some of this is inspiring to you! Right now our focus is on having fun and developing a love of learning. We do lots of art projects, reading books, and playdates with friends. We will plant a garden this summer and enjoy things like going to the farmer's market or library story time. I love just being with my two girls and enjoying life with them. I am planning to use My Father's World Kindergarten either this fall or January when Lucy will be 4 1/2.