Visit Math Playground and practice being a transformer! Check out the interactive geoboard, too! Or why not download a geoboard app on your iPad! (Geoboard, by The Math Learning Center and Geoboard, by Nuberkidz are both free!)

http://www.mathplayground.com/ShapeMods/ShapeMods.html

http://www.mathplayground.com/geoboard.html