Here's a grace that my wife knew from her days as a Girl Scout.
Johnny Appleseed Grace
The Lord's been good to me
And so I thank the Lord
For giving me the things I need
The sun and the rain and the apple seed.
The Lord's been good to me.
Below is a Video of a VBS class singing the grace, just so you get the tune.
It's a catchy tune, that may get stuck in your head. :)