Based on a really good metaphor - the book tells us how people carry around buckets, when the bucket is full people feel good, when empty, it feels sad -
my young son really understands it well, and can talk to him about how he's feeling- how full his bucket is!, and filling peoples buckets (i.e. making someone happy by saying doing nice stuff to/for em), and about emptying peoples buckets (i.e. making them sad by being mean etc),
in the book its also shown how filling someone else's bucket also fills your own - though i suppose it could create a more selfish wish to fill the bucket, the end result is still good- and it is so true- i've so often found that willingly doing good for other people does feel good- as does people doin good for you : )
It also shows bullies may have empty buckets - and says they try to take from other peoples buckets to fill their own, but it doesn't work- emptying someone else's bucket empties, not fills their buckets..........
And theres a really sweet bit, where it suggest different ways of filling buckets, such as letting your grandad you like spending time with him, and suggesting they fill a bucket now - to tell your mum or dad you love them, and why you love them, and watch them smile as it fills your bucket :) (it works : ) .
This means this book is also good for teaching communication of feelings, appreciations which so many of us sometimes forget to do-(and how often does this cause problems in various relationships?,) as well as encouraging focusing on and appreciating the good in life which can also result in feeling happier.
I do change one thing when reading tho, instead of saying `you need others to fill your bucket and others need you to fill theirs', I say `other people can fill your bucket, and you can fill theirs', as surely we can fill our own buckets too if we have the right mindset??.... but apart from that, the book is pretty much spot on I think.