To give us an idea of the overall feeling of your brand, let us know which styles you lean towards
I don't want the design to be too animated or cartoon-like, as it will have to appeal to older kids, as well as young children. It should be reflective of nature/American countryside and include a tree/treehouse theme.
Some idea: board-like steps going up a tree-trunk, leaves across the top of business card (but feel free to be creative).
I am located in the Texas Hill Country, where lake and outdoor recreation are popular. Target population is of a higher education level.