be a bucket filler

the kid: mommy, you're a great bucket filler.
me: um, thanks.
the kid: when you do something kind, you fill someone's bucket. we should always try to be a bucket filler and not a bucket dipper.
me: oh? did someone talk to you today about being a bucket filler?
the kid: it's a book. Ms. S (school counselor) read it to us. a bucket dipper is a bully. so it's not nice to be a bucket dipper. I'm going to try to fill as many buckets as I can because that would be awesome!
me: I know you'll do a great job. you are an awesome bucket filler.
the kid: awwwww. thanks, mommy. you just filled my bucket.