I just got back from our consignment store. I bought the Miquon Lab Sheet Annotations and will go back to get the children's books, and hopefully cuisenare rods.
My first grader played around with the DreamBox demo this afternoon and I played around with second and third grade. The K-2 section is harder to figure out but I really liked the 3-5 section. I think my DS is going to love it when he tries it.