ha! no concrete plans as yet
- alas, still a pipe dream (as is the extension )
will be in the next few years, I guess.
our set up (both family and house structure) just lends itself to having the garden room option. we have 2 adult children (
) who quite like their own space/not being woken at the crack of dawn by small children (however delightful dd1's singing is, it really is an acquired taste at 7am!), so having an annexe is a good option. so need sofabed etc in there.
so the room needs to be multi-purpose. we have an odd set-up garage-wise - we have 2 single garages, one behind the other, with a courtyard inbetween. the rear one is no earthly use to anyone as an actual garage, so the obvious choice to sacrifice when we get building (the kitchen will extend out alongside the rear garage).
so we will end up with a room with patio doors onto the garden (outdoors is really important to dd1, and will give me somewhere to loaf about while the children are all in the garden ), with tracks and hooks for swings/platforms. and then some mats/climbing frames on one wall.
and err, that's it for planning so far 
that frame looks good, especially if you can get it cheaper. ikea do soem good swing chairs, and I did have a link for a hammock company that did some interesting stuff too - cross between swing chairs, and hammocks. hang on a sec.