Informations & Facts:

Studying Trees
Trees for Toddler


Name that Tree! Using Leaves & Seeds for Tree Identification
Tree Journal Page
45 Tree Activities for Young Kids
Make a Neigbourhood Tree Guide
Exploring Trees
Montessori Inspired Tree Exploration 
How old is a Tree?
For the Love of Trees

Arts &Crafts:

Q-Tip Tree 
Tree Craft

Other ideas:

Count your blessings tree, keeping track of daily salah tree.