I used it all the time because I thought it was a fun way to exercise.
My cousins and I played on it on a lot during the summer holidays and we had competitions to see who could do the most star jumps.
But a couple of weeks ago I was trying to do a handstand on my trampoline when my younger brother jumped on.
I lost my balance and fell.
I hurt my left arm and because it was so sore and painful my mum and dad took me to the hospital.
At the hospital the doctors took an x-ray and discovered that I had broken my elbow and wrist in one arm.
I had to have my arm in plaster and I missed doing all the things that I enjoyed like karate and football.
I now have learnt not to go on the trampoline with two people and especially not to do handstands on it!
I hope that all other children with trampolines have fun but play safely."
Bobbie-Lee, 9, Londonderry
Why don't you write us a Press Pack report - and get it published on the site?!
It can be about anything that's happened in your local area - or your views on the news.