I read Plant a Kiss with my 2nd graders.
This book is written by the wonderful Amy Krouse Rosenthal and illustrated by the equally wonderful Peter H. Reynolds.
Here's a Book Trailer that you can use with your students. I read the book; we discussed what they thought the book was about; and, then I showed the book trailer.
This is slightly backwards, but here's why: the synopsis of the book at the end of the trailer helped start the discussion about what other things a person might plant.
I think "hugs" was the first suggestion in every class. Other popular ideas were: friendship, peace, love, joy and fun. Some interesting ideas came up, such as: dreams, creativity and hope. Cool things to plant indeed.
After brainstorming ideas as a group, they set off to plant something...
My library is a garden of hope!