Can differentiate with double digits (double digit by double digit multiplication or even fractions). This site has great math projects. This can be done with nails in a board and colored yarn. Makes a great pricture too.
Eye See You Emu @ Pinot's Palette Woodmere (Cleveland Paint and Sip Art Studio) - This inquisitive emu has a little bling, a lot of color, and lashes on fleek! The eyes have it on this cheerful painting!