shaving cream or not

as a teacher i had always heard of teachers who helped their students write their letters by using shaving cream. not being in the lower elementary grades myself, i had never tried it. but it sure sounded like a good idea. i even had read about it on a preschool activity website...
so since i am big and pregnant, as we all know, i am staying home a lot more. but to keep the kids from being bored, i thought i would try the old shaving cream in a casserole dish. i mean the girls could write letters and draw pictures. fun. right? um not so much. i don't know what age this activity is geared to, but it sure isn't 2 year old appropriate. brooke lasted about 1 minute. she did not want to do anything except dig her hands in the SC and smear it everywhere. it was a little better for hana. she did get it and actually played in it for about 10 minutes. but my over all recommendation is to save this activity for a while...