[Poppy and Daisy, meanwhile, can look forward to further immortalisation in a sequel to the book, which, feminist objections notwithstanding, has been on the top 10 bestseller list for several months.] I'd really like to do another one, from ages one to three, but after that there comes a time where you have to say, 'That's enough', ... We don't put them in adverts or anything, and I think when they go to school that will be that.