First Casualty of the Summer...

So, it's only May and we've lost a pair of flip-flops already (thank you Tanner). We've managed to ruin a swim shirt too (Alex). Oh - and a pair of sunglasses (I have no idea who to blame). Totally ridiculous. At what age do kids learn to be responsible for their own belongings? I'm not the best role model because I misplace things all the time...but was hoping the more sensible genes of their father would show through on this front!