I've done it loads. Incidentally, I've also published a novel. Who Let the Gods Out? is a comedy, fantasy adventure about modern immortals targeted at 9 - 12-year-old children. So it should be ideal for you rabble.
You can buy it here on Amazon where the e-book is currently half-price. It's also on my site Mary's site. And there's loads of them in my front room.
Many thanks Biccies. Now I've emerged from rehab, I'll be knocking around these parts rather more. Sorry.