We've recently moved into a garden where there would be space to put up a 'playden' (climbing ladder, Wendy house, little swing or slide, thingy) for our soon to be 5 year old (currently in Recpetion).

He's an only child, is a bundle of energy, and the rest of the garden isn't really child appropriate, so feels fair enough...

... But, how old would you expect a kid to be into one (both alone, and then getting mates over for play dates etc).

Would be a shame to lose the space and money for something with only a year or so of use.