Dinosaurs was a LEGO Theme introduced in 2001. The theme included different species of dinosaurs, in adult forms as well as smaller younger forms. The sets from the series did not include any minifigures.
- 6719 Brachiosaurus could be rebuilt into a Diplodocus, Plateosaurus and a Plesiosaurus.
- 6720 Tyrannosaurus Rex could be rebuilt into an Ouranosaurus, Parasaurolophus and a Spinosaurus.
- 6721 Mosasaurus could be rebuilt into a Dimetrodon, Iguanodon and a Postosuchus.
- 6722 Styracosaurus could be rebuilt into a Camarasaurus, Centrosaurus and a Triceratops.
- 5950 Baby Ankylosaurus
- 5951 Baby Iguanodon
- 5952 Baby Brachiosaurus
- 5953 Baby Dimetrodon
- 7000 Young Ankylosaurus
- 7001 Young Iguanodon
- 7002 Young Brachiosaurus
- 7003 Young Dimetrodon
- K7000 Dinosaurs Kit