A call for help!

I'm asking for help! I'm the secretary in our primary here, and for an upcoming activity we're learning about the Good Samaritan. We thought we could have the kids put together a simple craft that they could take home to so they could be secret helpers around the house. Like, they make their sisters bed,then they put this flower or whatever on her pillow, and it has a little poem attached to it that says something about how a secret helper did something nice for you, so now it's your turn to do something for someone else. And then it keeps going around the house. I volunteered to find a poem, and after googling several different phrases (I'm not sure if "secret service" is a good thing to Google or not), I haven't found anything. Any ideas? Please comment soon, the activity isn't until May but we wanted to start getting things put together soon. Thanks!