Trampolines

A climbing frame with a slide would be better. I think DD has made up her mind already though.

Not sure about the ages mine were about 4 years old with the small one and didn’t get a big one till they were about 9years

I know that my dgd (11) and dgs (8) have had many years of fun from their trampolines. They were large ones and were well maintained. Also placed on a grassy area for safety (though it doesn't do much for the grass underneath.)

Fun wise - they are a great investment. Shrieks of laughter and that included mummy and daddy, cousins, friends.

With regard to accidents, they need care when used as do swings and climbing frames etc.
It's up to the parents to supervise, maintain and properly dispose of them when they've had their day.

That's a good idea. I'll suggest it. I think they are too small for a big one anyway.
We didn't have garden swings but took our children to the play park so we could watch them. DD has no nearby park.

Sorry pressed too soon!
This is what we tried first then got a big round garden trampoline with the safety net fitted. And DH fixed to the ground tomake it safe.

From my observations of my neighbour's children, they can be rather dangerous. A little one doesn't have the physical control to deal with a trampoline. A little slide or climbing frame would be a better option until they are older.

How about trying the small square ones with the bar, and see how the little ones get on?