With the half-term holidays coming up, here's a treat for the boys: Dinosaurs Unleashed. You might not be able to get the little devils to peruse a traditional statue, but offer them life-sized dinosaur animatronics and they go bananas. This collection, complete with swamp, occupies a vacant building lot in Oxford Street, opposite Selfridges department store. The exhibition runs until 30 April. Ticket prices start at £11. Click the title link for details.