These cards can be used to show children the life cycle of an oak tree: from acorn, to seedling, to young oak tree, to full grown oak tree. These can also be added to the science center, along with the self-checking card, for children to put in order.
[plantabillion.org. April 24, 2015 is Arbor Day. Plant a tree and/or join the Arbor Day Foundation. For a membership fee of $10, they will plant ten trees in an endangered forest in your honor.] * * AWESOME.