By the end of the school year my Kinder can sound out/read these words. I divide the class into groups of 4, and give each group a list and a paper bag (a plastic grocery bag works just as well.) Taking them out to the vacant lot/playground, I let them search for the items on their list.
The list has the following words: rock, leaf, flower, grass, seed, and wood, plus a ? and an X. The ? means they don't know what the item is, and X is for anything that's not on the list - their "eXtra" choice.
When we're finished, we go back to the classroom where each team can then dump the contents of their bags, and they discuss with the class what they found.