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,

Because of the number of pieces involved and the complexity of the designs, LEGO Icons sets are rated for ages 18 and up. But if assembled with an adult nearby, they can be excellent long-term projects for tweens and younger teens. This fancy hotel from the turn of the 20th century features a domed roof and a tiled lobby floor.