Does anyone have, or know what I'm talking about, if I say I'm looking for cuisinaire rod activity books? I have one that I picked up at a used curriculum fair that is abc's --there's a picture you "draw" with rods then it asks you questions about them... how many white rods make up this letter/etc. Think preschool-ish level... someone told me there are other kinds of them - like one about a farm or a city... but I can't find them. ANyone have any ideas how I can find them?? thanks!!