My parents went in with us this year on a birthday gift for all the kids.
My mom and dad wanted to get a jungle gym. I liked that idea too, but it was a bit more expensive, and I was afraid it might require more maintenance. So, we decided on the trampoline.
I am so glad we did. The kids love it. I often say, "Go outside, and jump on the trampoline!", and I don't think they have once complained about the idea.
That's pretty great.