Austin Marek has made a fan board (a while ago I believe)!
And he has kindly let us use pictures of it on the 'Plans' page while I continue to develope them!
If you want to go to the fan forum, just click on the link at the bottom of the page! At the time of posting this, there are no members, so join up and you could be the person to make the first ever post! You should enjoy the forum, the first Jumanji related one (to my knowledge). So go have fun, let us know who you are, and say 'Hi'!
Made for the site opening, a simple paper model of the jumanji board is now availiable for download here. I hope you all enjoy it, and understand the effort that went into making it. While your waiting for the plans to be finished, I am sure you could blow this model up until it is the desired size, then you would have yourself a rather nice looking board!