In answer to your question whether you should build it or not...... YES! Go for it, it's creative.
Yeah I'm proud of it and she seems to like it.
Although I don't get to see her in it...this one is at her muns. I was going to make 2 (snd have one at my place) but it took so long I don't think I'll make another one (not for a while anyway! )
Made lots of mistakes too but there's a learning curve!
And got there in the end.
I tend to use marine ply for one main reason.
It is incredibly strong.
I have used 18mm sheets of marine ply as a trampoline and they just give, but with no sign of damage. Try that with ordinary ply.
As I am well in excess of mumble stone now, that strength is appreciated!
But also appreciated where bouncing kids are concerned.