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Paper animatronics are hand-powered paper or cardboard automata: a crank, cam, or linkage makes a paper character move. You do not need electronics or a motor. For a first project, a rotating cam that lifts and lowers a guided follower is one of the simplest mechanisms to build.
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How a paper automaton moves
The paper character is only the visible part; a mechanism beneath it supplies the motion. In a basic cam-and-follower design, turning a handle rotates an axle and a cam attached to it. As the cam turns, it pushes a follower upward. Gravity or another return arrangement brings the follower down again, creating repeated movement. The Robert C. Williams Museum of Papermaking describes how crankshafts and cams convert spinning motion into up-and-down motion in its Paper in Motion: Animal Automata workshop description. A cardboard-frame example with a crank, dowel axle, cam, straw guide, and paper character is shown by Stemoto.
Changing the mechanism changes what the character can do. A cam can make a part bob or rock; cranks and levers can transmit movement elsewhere; gears can coordinate rotation. The IET’s moving-animal project combines cams and linkages to move an animal’s legs.
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- An amazing interactive automata model powered by the simple crank; Great Christmas gift, birthday present and DIY project for kids
- Assemble the paper kit and turn crank to enjoy this automation; The only tool needed is glue
- Designed by Keith Newstead, a world-renowned British automata designer, whose fabulous automata works can be seen in the British Museum, the Tower of London, and the UK's National Gallery
- Learn the mechanical principles of levers and gears
- Recommended for children 7 years old or older; WARNING: CHOKING HAZARD- Small parts. Not suitable for children under 3 years.
Choose a mechanism for the motion you want
| Mechanism | Typical motion | Build considerations |
|---|---|---|
| Cam and follower | Repeated up-and-down movement | A good simple starting point; the cam must contact the follower, which needs a guide and a way to return. |
| Crank and linkage | Back-and-forth movement, or movement passed to another part | Linkages add parts and joints that need room to move without binding. |
| Gears | Rotating movement between connected parts | Gear placement and alignment matter; the cited paper-engineering material identifies gears as an option but does not provide standardized performance measurements. |
These are qualitative comparisons: the cited projects do not report standardized measurements for force, speed, durability, or friction. Choose based on the movement you want, how many moving parts you are comfortable assembling, and how easily you can adjust the layout.
Materials for a simple crank-and-cam build
Exact materials depend on the design. A practical starter set, drawn from the cited projects, can include:
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- Cardstock or firm paper for a character or template. Maker Camp’s Paper Craft Automata project instructs builders to print its template on cardstock.
- Cardboard for a frame, body, or cam.
- A skewer or dowel for the axle.
- A short piece of straw to guide the follower.
- Glue or tape, and scissors.
Some designs use foam cams or add linkages. These are examples, not requirements for every automaton. The IET animal project, for instance, uses paper templates on a cardboard mechanism with cams, linkages, and a skewer shaft.
Build and check the mechanism before decorating
- Plan the movement. Decide which part should move and in what direction. For a first build, choose one simple action, such as making a character rise and fall.
- Make the frame and axle supports. Set up the cardboard frame so the axle can turn. In Stemoto’s construction example, holes need to be large enough for the sticks to spin freely.
- Attach the crank and cam. Fix the cam to the axle so turning the handle rotates the cam with it.
- Add a guided follower. Position a follower where the cam can push it, and use a guide such as a straw section to keep its travel in line.
- Turn the bare mechanism by hand. Check that the axle moves freely, the cam stays attached, and it consistently contacts the follower. Correct rubbing, loose joints, or misalignment before adding a character.
- Add a light paper character and try again. Confirm that the character moves without catching. Decorate only after the mechanism works, so decoration does not make it harder to find alignment or friction problems.
Related paper projects that are not crank-driven automata
A paper project can involve engineering without using a crank. The Victoria and Albert Museum’s paper peepshow has printable templates and instructions for building a layered optical stage scene; it is not a crank-driven automaton.
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