The Lego Ideas Dinosaur Triceratops Horridus, 21320 instruction manual is a booklet released by LEGO in 2019 as part of their Ideas theme. Designed for building the Dinosaur Fossils set, this manual contains step-by-step instructions for constructing the Triceratops Horridus model. This manual is a valuable resource for LEGO enthusiasts looking to recreate this specific dinosaur model.