It's a shame that so few art galleries take the opportunity to put on exhibitions to attract children over the school summer holidays. The big London galleries pay lip service to encouraging children toward art, but to find a major exhibition of illustrations designed to appeal to young children you need to go up north to Manchester Art Gallery, which is showing Green Drops and Moonsquirters: The Utterly Imaginative World of Lauren Child, an interactive exhibition from award-winning children’s author and illustrator Lauren Child. Never heard of her? Think Charlie and Lola, a huge success in books and on TV, and Clarice Bean. Above is an illustration from That Pesky Rat. This free exhibition continues until 21 September.