Some of the branches were long and kind of resembled rope, so they were easy to twist, turn and mold into various shapes. With these she was able to form the shape of a hobbit sized door. The shorter, stronger branches she would use to hold the structure in place.
She then used small twigs and branches to lay over the any holes, then used the dead leaves to cover the fort. Overall it was a small structure, but just the sheer thought process and energy that went into making something out of natural materials I feel is valuable in getting children to think outside of the box, and to build their creativity and imagination.
The following week we were at the park again and she asked if we could build something else. And this time, without much help from me collected materials on her own and began to make her own fort.