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Models shared by the SO3D.xyz community. Open any of them in the generator to see exactly how it was built, remix it, or print it as-is. Browse the model library by category

Preview of Feely-box guessing game
By Krypto
Complexity
Multi-part assembly
MAIN PURPOSE: Guess hidden objects by touch while the audience watches through the back window
Put something mysterious inside: a peeled grape, a pine cone, a toy dinosaur, cold spaghetti. The guesser reaches in through the two arm holes and has to name it by touch alone. The audience can see everything through the window at the back, and their faces are half the fun. It also builds vocabulary and touch skills for young children, and the lid keeps the next surprise hidden.
AR view Open in app
Preview of Relay-proof key-fob safe
By Krypto
Complexity
Multi-part assembly
MAIN PURPOSE: Block keyless car fobs from relay thieves with a foil-lined box
Keyless car fobs never stop talking, and thieves use a relay to pick up the signal through your front door and unlock the car outside. Line this box and its deep slip-on lid with overlapping foil tape and it becomes a Faraday cage: radio waves cannot get in or out. Drop the fobs in at night and test it by trying the car door with the fob inside. NO SIGNAL is raised on the lid.
AR view Open in app
Preview of Phone-cam bird feeder
By Krypto
Complexity
Multi-part assembly
MAIN PURPOSE: Feed garden birds while an old phone films them close up
Smart bird feeders with cameras cost a fortune; this one uses the old phone in your drawer. The seed tray sits in front of a covered garage where the phone stands with its camera behind a wide window, about a beak's length from the birds, and the lid keeps the rain off. Start a motion-triggered camera app, and you get close-up videos of every robin, tit and squirrel that visits. SMILE is on the front.
AR view Open in app
Preview of Tortoise fridge-hibernation box
By Krypto
Complexity
Multi-part assembly
MAIN PURPOSE: Hibernate a tortoise safely in a vented box in a dedicated fridge
Many reptile vets now recommend hibernating Mediterranean tortoises in a dedicated fridge, because it holds a steady 5 degrees where a garage or shed swings from freezing to warm. This box sits on the fridge shelf with a bed of soil or shredded paper; the vents on both sides let fresh air in, and the lid lifts off for the weekly weigh-in and to open the door for air. DO NOT DISTURB is raised on the front.
AR view Open in app
Preview of Ocean-wave drum
By Krypto
Complexity
Multi-part assembly
MAIN PURPOSE: Tilt a sealed drum of beads slowly to hear surf breaking on a beach
Ocean drums are an old sound-effects trick, used in theatres and music therapy. A handful of steel beads lies inside a wide, flat drum. Tilt it slowly and the beads roll across the wave-ridged floor in a long rushing hiss, exactly like a wave running up the sand; tip it back and the wave draws away. Shake it for rain, roll it for a storm. Children love it, and it is wonderfully calming at bedtime.
AR view Open in app
Preview of Smartphone projector with focus slots
By Krypto
Complexity
Multi-part assembly
MAIN PURPOSE: Project a phone screen onto a wall through a magnifying lens
A shoebox cinema, done properly. A magnifying lens fits over the round front port, and the phone stands upright in one of four numbered focus slots inside. Moving it back a slot focuses the picture on the wall like a slide projector, with no sliding parts. The lid blacks out the box so the image is as bright as possible. Lights off, film on.
AR view Open in app
Preview of Giant matchbox keepsake
By Krypto
Complexity
Multi-part assembly
MAIN PURPOSE: Give a gift that slides out of a giant matchbox
Everyone knows how a matchbox opens, so a giant one is a gift box with a built-in moment: push the drawer and the present slides out. It is sized for jewellery, a watch, a message or tickets. OPEN ME is raised on the drawer end.
AR view Open in app
Preview of Egg-drop challenge pod
By Krypto
Complexity
Multi-part assembly
MAIN PURPOSE: Protect a raw egg in a drop test with rubber-band suspension and a parachute ring
The classic school engineering challenge, turned into a reusable test rig. The egg sits in a round inner cradle, and the holes all over the walls let you thread rubber bands across the pod to hang it like a hammock. Fill the gap with your own crumple zone: straws, foam or popcorn. The ring on the lid takes a parachute. Drop it down the stairwell, open it up and see whether your design held, then change one thing and drop again.
AR view Open in app
Preview of Family chore turntable
By Krypto
Complexity
Multi-part assembly
MAIN PURPOSE: Rotate household chores between family members every week
No more arguing about whose turn it is. Each bay holds a family member's name token, and each side of the box names a chore: DISHES, BINS, PETS, TIDY. Every week, a quarter turn on the ball-bearing base moves everyone on to the next job. It is fair, visible and spun by the children themselves.
AR view Open in app
Preview of Swear jar
By Krypto
Complexity
Multi-part assembly
MAIN PURPOSE: Collect a coin for every swear word through a swinging flap
The family swear jar, with a bin-style swing flap that swallows each fine with a satisfying clack. SWEAR JAR is raised on the front and PAY UP on the side. Spend the takings on a takeaway everyone shares.
AR view Open in app

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