What God wants?

I really, really, really hate making him get off the trampoline.  As much as I am loving the weather lately, I can not wait for it to starting snowing and be too cold for him to go outside and run, jump and .....well be an almost 5 year old boy.  On the flip side, there's the whole thing about the cold weather irritating his hip more and causing pain.  I have yet to figure out what God wants our family to learn from this, I pray that answer comes soon.