You are teaching them great lesson. I hope they will carry that with them until they grow old and apply it all the time. We really should start them young teaching them the importance of protecting nature and maintaining cleanliness of the environment. Sometimes the bad things they see around them influences them more that they begin to question if what they are doing is worth it. Garbage is also the biggest problem here in our place. By starting in our homes, we can spread out in our localities and make others aware of the keeping cleanliness.