There are loads of poets writing for children! But one of my favourites is Gareth Owen, who writes on a huge range of topics for children, because many of his poems have something that adults can appreciate too. Have a look on the Internet and you'll find lots of Gareth Owen's poems. I have his Collected poems for children and it has loads of Post-it notes sticking out - always a sign that a book of poems is interesting / useful / definitely worth reading.
A poetry recommendation for those of you who are at home with children