Meet a Tree
Divide the children into pairs. Within each pair, one person closes his or her eyes (or uses a blindfold) and the other child is the leader. Have the leader guide his or her partner to a tree. Once there, the blindfolded child should touch and smell the tree, put his or her arms around it, and otherwise get to know it. Then have the leaders guide their partners away. When they open their eyes or remove their blindfolds, see if these children can find the tree they just met. Then have the kids switch roles.