• 916 building pieces — silver frame parts, brass-tone gearing and the jaw linkage
• Motor, speaker, LED and mist components — supplied as parts to fit during the build
• Display base and nameplate — one button on the base runs everything
• Printed step-by-step manual
• Retail box

All four effects run together from a single power button. There is no separate control for each function.

• Moving jaw — the lower jaw drives open and closed on a gear train, cycling through a slow bite. The whole linkage stays visible as it works.
• Red LED eye — a translucent red lens set deep in the socket stays lit while the unit runs. It reads best in a dim room.
• Roar audio — a speaker in the base plays a low predator roar in time with the jaw.
• Mist breath — fill the reservoir and vapour rolls out between the teeth as the jaw opens. This is the effect people stop and look at.

You assemble the drive unit yourself. The motor, speaker, LED and mist components come as parts, not as a sealed module — fitting them is part of the build. The printed manual walks through it step by step alongside the rest of the skull, so it stays approachable even if this is your first mechanical set.

Bricks and fit. All 916 pieces are moulded in ABS to a tight clutch tolerance. Connections hold without creeping, so the finished skull keeps its pose on a shelf indefinitely, and pieces come apart cleanly if you want to rebuild.

Compatibility. Standard stud sizing throughout — the bricks interlock with most major brick systems if you want to extend the base or the display.

Planning modifications? If you intend to modify the model or run it on a different battery type, email us first and we'll confirm whether the design supports it. Changing the power source without checking can damage the motor unit.

Three things worth knowing up front, so there are no surprises when the box arrives.

Batteries aren't included. You'll need 6 × AAA. Loose batteries can't be shipped internationally by air, so no set ships with them — any standard alkaline AAA will do.

Runtime is about 30 minutes. That's continuous operation per set of batteries. This is a display piece you switch on when you want the effects, not something to leave running all day.

Purified water only. Use purified or distilled water in the mist reservoir. Tap water leaves mineral scale that will clog the unit over time. No oils, fragrances or additives.

Dust the skull with a soft dry cloth. Empty the mist reservoir whenever the model is stored — leaving water sitting in it is the main cause of a mist unit clogging. Keep the motor, speaker and LED away from water when cleaning, and keep the finished piece out of prolonged direct sunlight so the colours hold.

Safety warning: Contains small parts — choking hazard. Not suitable for children under 14. Keep loose parts away from infants and toddlers. All bricks are made from non-toxic ABS material intended for adult-oriented model construction.

6 × AAA. Loose batteries can't be sent by international air freight, so no set ships with them. Standard alkaline AAA from any supermarket will do.

Around 30 minutes of continuous operation. In practice most owners switch it on to show it off rather than run it constantly, so a set lasts a good while.

No — all four effects run on the same circuit and start together from one button. If you want it silent, display it with the power off; the skull holds its pose either way.

Purified or distilled water only. Tap water leaves mineral scale that builds up and eventually clogs the unit. Never use oils, fragrances or any additive. Nothing is heated — the mist is cool vapour, and water is the only thing you ever need to refill.

Yes. The motor, speaker, LED and mist parts are fitted during the build rather than arriving as a sealed module. The printed manual covers those steps in the same step-by-step format as the rest of the model.

Yes. The skull holds its pose whether or not the effects are running, so it works as a shelf piece on its own and you switch it on when you want it.

Same one-button operation and build logic across all four. This one is all silver with a long tooth-lined jaw; the Triceratops is wide through a brass-tone frill; the Pterosaur is the tallest and longest, with the only green eye; the Dilophosaurus has the highest piece count and twin posable crests. They're designed to sit together as a set.

Email us before you do. We'll confirm whether the design supports the change — swapping the battery type without checking can damage the motor unit.

It's one of our most-given sets. The build is substantial enough to be a real project, and the finished piece actually does something — which is what makes it land better than a static model for a birthday, anniversary or Christmas.