I guess we forgot that lesson

In the year leading up to school we went over many things with the twins to get them ready for school.  Many of the lessons we went over many times were sharing with friends, abc's, 123, how to take our turn, how to put our shoes on etc.  Well I guess after the look of their lunch kits today we forgot a lesson........if you open your yogurt drink and don't drink it all.....it's okay to put it in the garbage.....DO NOT replace the open container that no longer has a lid back into your lunch box....oie what a mess!