Help! What's the best tiny space garden climbing frame?

[Naicemum]

Help, need something to keep my two occupied when I chuck them in the garden. Any recommendations for nice looking play equipment for a very very tiny garden space (about 2x2.5ish metres next to fir trees) for a very energetic 3 and 7 year old. Happy to invest if it will last the ages.

We already have a sandpit and a water play table so looking for permanent den/climbing frame. I'm not sure we have space for a swing or a slide - but if anyone has a recommendation that will fit that would be great.

Thanks Mumsnet