Hi, Kat --
From what I know/been told -- now is not a good time to send crayons -- it's too hot. You can try the "leave 'em in a parked car in the sun" test and see -- but I'm bettin' by the time they make it to where they're going, they'll have been sitting on pallets in Really hot sun for days, if not weeks.
For now, I'd suggest colored pencils along with some of those little sharpeners. Send the crayons in the fall and winter -- same way we time the chocolate shipments 
--Marilyn
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“With your unconditional support, you make it possible for our Soldiers to reach out in compassion, instead of with bullets.” SPC Nicole Starr, AS contact, 10/24/08