Kid's future castle

I'm working on building a playhouse for the kids in the backyard.  It's going to be an elevated playhouse with an enclosed area below it to store garden tools, lawn mowers, etc.  Below is a picture of the elevated deck as it currently stands.  I took the picture as I was staining the deck.

You can't really tell by the picture, but the deck is elevated about 5 feet above ground.  I'll build the playhouse on top of this.

I'm planning on this being a long project.  It was started last summer, and with any luck, will be completed this summer.

The kids have helped at various stages.  They love to help in any way they can!  You may recall back in July how they helped dig holes for the posts...

Post hole kids