Who fancies a little family day-out/barbecue at Lochmühle? It's a Freizeitpark with plenty of stuff for kids to do up to about 11 years old - perhaps older actually, because there are some green patches for kicking around a football or general messing around - oh and there's also crazy golf (yippee!).
Anyway, they have barbecue pits where you can bring along a few logs and a couple of slabs of meat and barbie to your hearts content.
The park is along the A5 near Friedberg. Here's a link: www.lochmuehle.de
Just post if you're vaguely interested so that I can get an idea of numbers.
Jean-Pierre