Made a tier list of Ninjago monsters (link in the comments) : r/Ninjago
I Built 10 LEGO MONSTERS from NINJAGO... - YouTube
LEGO NINJAGO Kai and Ras' Car and Bike Battle 71789 Beginner Building Toy Set for Toddlers, Features 2 Vehicles and 2 Minifigures, Gift Idea for Kids Ages 4+ Who Love Ninja Adventures - Walmart.com