"Don't get your knickers in a knot." grin
I think DD5 picked that one up from her preschool teacher.

P.S. Your son might like the imponderables book series by David Feldman: Do Penguins Have Knees, How Does an Aspirin Find a Headache, When Do Fish Sleep...

http://www.amazon.com/Penguins-Have-Knees-David-Feldman/dp/006092327X

Last edited by inky; 05/06/09 07:29 AM. Reason: P.S.