Buy a variety of picture postcards ahead of time and address and stamp them. Punch two holes in the top of each one about 2 inches apart. When you send your children off to camp, pack 2 notebook rings in with their gear. Every time you send a card they can insert it onto the rings. The space to write them in is so limited it is easy to write one every day.
C are packages.
You must send a care package because every other child in the world who goes to camp gets one. Make sure you know what the camp rules are. Some say no food of any kind. The possibilities endless. E ncourage others.