I recently sent off the following kit to my youngest son, whose birthday happened to fall during finals week (poor kid.) I found all of the items at Walmart, and everything fit into a medium-sized priority mail flat-rate box. I simply wrote silly captions on post-its, attached them to the items, and placed everything in the box.
It's not much, but I know my kids look forward to their care packages. If you'd like to see some of the other kits I've compiled, check my posts here , here and here.
Thanks for hard-working students!