Trampoline

A month ago the trampoline was appeared on the lawn of our country house. It was a birthday gift to a niece. Since the trampoline was assembled there was not one day that children didn't jump from morning till night because jumping is so hilarious. As for me I always use my chance to jump every time when I come to the country house.

[Good job.  I use 'chance' because it fits better.  'Ability' just implies more that you are physically able to do it, not that you necessarily have the chance to do it.  It is technically correct, but not what would be used.]