I hunt for deals for a living and I think one of the best Amazon Prime Day Lego deals available is 30% off the Lego Technic NASA Lunar Roving Vehicle.

Make note that many Lego sets may seem like a good deal, but they've actually been sitting at the same "deal" price for five months or more. For example, this Lego Creator 3-in-1 Flowers in Watering Can set looks appealing at 20% off,

The only real issue with a Lego habit is that it gets expensive fast, no matter if you are trying to recreate the entirety of Middle Earth with supersized Lord of the Rings sets, or kitting out your model Formula 1 racing team at home.