lol. I was showing my mum the shiny red ball earlier on, as I was demonstrating it's capabilities of not hitting the ppl, one of the children was jumping on the bed. She asked me why he was jumping on the bed. I said they did that, along with rolling in the dirt, banging dishes and drawing on the walls. She turned around and said 'Normal kid behaviour then'. I agreed.
I don't normally bother if they do these things to tell them off for it. My parents had the 'maximum' amount of children (I wonder if she got a trophy for it. I'll have to ask her) so to me it's fairly normal things to do.