Jerome, there is no set rules, This is a fun thing for the holidays. Take what you can use, give what you can. Give what you think will give someone a smile. The only reason we have an in/out in the box is so that in the end people can see who got the items they put in, or how far an item traveled. Plus it gives insight for the next iteration of the box for what is popular and what may not be. Remember, just have fun.