Here is the rest of my tentative plan for the year.
For the younger set (5 and under), I think we'll just continue with lots of reading, learning the basic concepts and skills, lots of simple projects- they are very into arts and crafts these days and let them participate in as many things as possible with the older kids according to their interest and ability. The 5 year old might be ready for some phonics work, she also loves geography and having a great visual memory loves learning new places on the map despite not being able to read. We might incorporate some Montessori activities as well.
I read through quite a few pre-school books that I have and project books that I have for this age for inspiration -Don't Move the Muffin Tins by Bev Bos, One-to-One Learning by Gareth Lewis, Raising Brighter Children by Sidney Ledson in particular have many great ideas for very young children and up.
I think for the younger children just reading to them, lots of creative play, art projects, outdoor play and exploration, exposing them to interesting and beautiful things and ideas and just participating in regular family life and activities provides plenty of preparation for launching into more formal academics when they are ready. And that, as they say, is that.