Harry Potter Lego might be the ultimate autumn activity. And if you're looking for an excuse to expand your collection, you got it: there are tons of discounts on a whole range of kits at Amazon right now. It's Amazon Prime Day next week (6-7 October), but these are early deals, and you don't need to be a Prime subscriber to take advantage of them. If you want to push the boat out, there are discounts on big, pricey sets that'll occupy you for a weekend (depending on your speed-building skills), and simpler, cheap sets that'd make great stocking stuffers (sorry, I know it's too soon). My favorite is the Quality Quidditch Supplies & Ice Cream Parlour Set, with 44% off. It features two charming shops from Diagon Alley — the fact that it's split into two makes it ideal for a sociable Lego session with a friend. I'm also a big fan of the full Diagon Alley set, a relatively new kit that has 24% off right now. It shrinks down the entire street to micro-scale and comes with 12 microfigures to populate it.Not taken with those? There's something for every Potter-head — scroll down for all of my top picks.Accio Lego deals! Lego Harry Potter Quality Quidditch Supplies & Ice Cream Parlour 76452 Lego Harry Potter Enchanted Flying Ford Anglia 76470 Lego Harry Potter Luna Lovegood's House 76467 Lego Harry Potter Hagrid & Harry's Privet Drive Escape 76459 Lego Harry Potter Hogwarts Castle and Grounds 76419 Lego Harry Potter Philosopher's Stone – Collectors' Edition 76466 Lego Harry Potter Cauldron: Secret Potions Classroom 76464 Lego Harry Potter Hogwarts Castle: Hospital Wing 76463 Lego Harry Potter Cornish Pixie 76461 Lego Harry Potter Hogwarts Castle: Sorting Hat Ceremony 76460 Lego Harry Potter Hogwarts House Crest 76462 Lego Harry Potter Dobby the Free Elf 76469 Lego Harry Potter Hogwarts Castle: East Wing 76473 Lego Harry Potter Hogwarts Herbology Plants 76474 Lego Harry Potter Hogwarts Castle: the Main Tower 76454 Lego Harry Potter Privet Drive: Aunt Marge's Visit 76451 Lego Harry Potter Book Nook: Hogwarts Express 76450 Lego Harry Potter Chomping Monster Book of Monsters 76449 Lego Harry Potter Hogwarts Castle: Herbology Class 76445 Lego Harry Potter Knockturn Alley Wizarding Shops 76471 Lego Harry Potter Knight Bus Adventure 76446 Lego Harry Potter Hogwarts Castle: Charms Class 76442 Lego Harry Potter Diagon Alley Wizarding Shops 76444 Lego Harry Potter Hagrid & Harry's Motorcycle Ride 76443 Lego Harry Potter Flying Ford Anglia 76424