Here is a set of five-finger games for you to use while practicing your grasping position at the piano. See Lesson Three or the virtual piano at http://play-piano.org/play_online_piano_piano.html if you need to remind yourself the names of the keys. The white keys are named A-B-C-D-E-F-G, and then we start over.
(Diagram from A Workbook for Organic Piano Playing, copyright Michaele Benedict, 1977.)