With the exception of the obvious "geotrash," the wet stuff, the expired stuff, etc., I don't think that a finder of a cache should take it upon him/herself to "cleanse" the cache of "geotrash." Granted, most children don't own GPS's, but this is an activity that families participate in together. Kids included. On numerous occasions I have taken young children out geocaching with me, and they always have been so excited to find a cache filled with "geotrash." They also, in return for the "geotrash" they have taken, have put some of their own "geotrash" back into the cache, which just earlier in the day was painstakingly chosen to trade from what they have to choose from-their small, often plastic toys. It is not up to a finder to decide what is geotrash and remove it. Just remember, this is not an adults only activity.