Using radio to contact persons on ground while flying?

Hi Everyone,

Sorry if this is a stupid question, but I purchased a backup handheld radio
for cross country flights, etc. and was wondering if it is permitted to use
it so I can contact my family while flying over the local area.

I would use a frequency not used locally for any other purposes.

Your thoughts?

--
Thanks,

Steve

"When once you have tasted flight, you will forever walk the Earth
with your eyes turned skyward, for there you have been, and there
you will always long to return"
- Leonardo Da Vinci