Reward for leaving her stuff? Of course not. It's reward for NOT leaving her stuff. Mum made a small calender and put it on a fridge. If Kate successfully brings all her stuff back home, she will get a sticker *just a simple circle one* to put on the calender. And to make it more challenging, if she does it 5 in a row, she will get another reward *to put in her saving box*.
And on the next 4 weeks, she brought everything back home.
Well done, Kate!
Update: