Whether your class is learning about the joy of giving or the wonders of what nature can provide, The Giving Tree by Shel Silverstein is a perfect pairing to your thematic unit of study.
Use this emergent reader as a companion to the classic story we all know and love. It can be used as an individual centers activity and functions as an interactive booklet for practicing handwriting...you might even use it as a sight word search! Maybe you could have students only trace the sight words they find as they read with you at your Guided Reading table.
However you implement it, I hope you enjoy the hand drawn illustrations and written text in this booklet inspired by Silverstein's classic parable. Cheers! (PS - Keep your eyes out for a companion worksheet in my store's listings!!!)