This book is basically a long version of "treat others the way you want to be treated". By doing something nice you are filling another person's bucket, while also filling yours. Negative actions cause negative results. By treating others poorly, you take away from both their bucket and your own. I think this book could relate to all grade levels (k-6th). Every age student needs to know that words have such a powerful impact, as do positive actions. I would incorporate this book into my classroom by having each student have a "bucket" of some type and they would have the opportunity to fill it and it could be treated as a goal. The students could write what they did that day to help fill their bucket then place it in. At the end of the year they could look back on all the positive things they did. It could be an individual or group activity. I think this activity could even have the potential to go school wide.