My neighbour's daughter (aged 10 or 11) is coming in to feed my cat while I am away for a couple of days. I trust her - she did a great job of watering my greenhouse and feeding outdoor fish for a few days back in the summer. That time I brought her back a small present but this time would like to pay her. The cat has access to outside so she will be doing 4 feeds, plus fussing him a bit (if he will let her!). I will introduce them properly beforehand. I am thinking £20 - is that fair?