I am starting to put together ideas for my youngest one during next years school season. Right now I set our table up with mini-stations for him to work through while I do lessons with my daughter. He has enjoyed these stations but as we re-use the same materials over and over his attention span is slowly dwindling. He is getting a bit older to where I will put our a bit more art, basic science exploration and letter work this year -- he is ready for it.
One new learning activity I recently picked up is called Imaginets. It is a wooden case with a magnetic white board and colorful wooden shapes that are magnets. He can free play with it or use the cards included to create shapes, things or animals. There are very easy cards that we will use to start and much more challenging cards he can work up to. I have let him try this out a couple of times now and he loves it! I love that it is very well made, thin for storage, age appropriate but will grow with him and can even work for travel in our trailer. It should make for a great addition to our home and learning table!