I wanted to make people aware of the Legoland Duplo Days offer where it's £25 for an adult and 1 under 5 on certain days in Sept & Oct. You can't seem to book the tickets via the main website as the Duplo Days tickets don't come up but if you click here, then it should all work: www.legoland.co.uk/tickets-and-passes/duplo-days/
You might all already know about this but they've made it quite difficult to find online so thought it worth sharing.