My Vision for a Special Kids Garden

I have a vision in my head for a special kids play area. I am going to post it here so I won't forget it. I am not talking about a kids garden they tend themselves. They will have that as well. I am talking about a special place to play where things are growing. I am picturing a square of grass big enough for all the kids to sit in. All around the grass area will be like a moat with a pathway in. The moat area will be where the plants grow. I want to find large branches and tie them together to make a sort of tee pee and plant vining and climbing plants to grow up and over these branches creating a sort of canopy. There will be walls of sunflowers, cosmos, daisies, corn, and whatever else I think will grow well. Maybe snap peas and carrots for quick play time snacks. Also cut tree trunk rounds for sitting, standing on, or to use as a table. This will be like a summer nature fort. I know I have seen similar ideas online and am really excited to maybe have one for the kids this year. I think they would really enjoy this. This is more of a note to myself so sorry if you are trying to make any sense of this. :) If I can work out the details and get this done I will be sure to post more details and pictures.