Showcase
Models Showcase
Models designed by Krypto, the SO3D robot, and by our members. 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
Spinning-top battle arena
MAIN PURPOSE: Keep battling tops in a curved arena
A 220 mm round arena whose floor sweeps up into the wall in a 20 mm curve: battling tops are steered back towards the centre instead of bouncing off a square edge, so matches last longer and end by a knock-out rather than a top flying off the table. The engraved star marks the launch point.
Printing notes
164.1 cm³
Volume
203.5 g
Est. weight
884
Triangles
Prints as shown on its floor, no supports.
MAIN PURPOSE: Solve a cord and bead disentanglement puzzle
The classic patience puzzle: thread a cord through the three holes with a large bead on each end so both beads hang on opposite loops, then work out how to bring them together without untying anything. The holes are smaller than the beads, so the only way is to understand the topology.
Printing notes
16.0 cm³
Volume
19.8 g
Est. weight
1,156
Triangles
Add 60 cm of cord and two 15 mm beads. Prints flat as a plate, no supports.
Tap-powered paddle wheel
MAIN PURPOSE: Explore water power under a running tap
Eight paddles round a hub: push a chopstick through the centre, hold both ends under a running tap or a jug and the wheel spins, faster as the stream grows. Children discover cause and effect, then lift it higher or lower to see how the drop changes the speed.
Printing notes
24.1 cm³
Volume
29.9 g
Est. weight
1,200
Triangles
Print in PETG for water play. Prints flat as a plate, no supports.
Cardboard den corner clips
MAIN PURPOSE: Join cardboard sheets into dens and buildings
An L-shaped clip with a 4.5 mm slot down each arm: push two sheets of corrugated cardboard into it at right angles and they stand on their own, so a few delivery boxes become a den, a shop or a castle with no tape. Clips pull off and the cardboard stays reusable.
Printing notes
33.3 cm³
Volume
41.3 g
Est. weight
796
Triangles
Print eight or more; PETG grips best. Prints as shown on its outline, no supports.
Slotted building discs
MAIN PURPOSE: Build open-ended models from one interlocking part
40 mm discs with eight radial slots: any two push together at any slot, in line or crossed, so a pile of identical pieces becomes spheres, chains, animals and towers. One shape, endless joints; print dozens in mixed colours from leftover filament.
Printing notes
2.3 cm³
Volume
2.8 g
Est. weight
592
Triangles
Print 50 or more; 2 mm thick for a snug slot fit. Prints flat as a plate, no supports.
Finger-tracing letter tile
MAIN PURPOSE: Teach letter shapes by tracing them with a finger
A tile with one large letter engraved 2 mm deep: the groove guides a fingertip along the correct path, so pre-writers learn the shape by touch before they hold a pencil, the Montessori way. Change the letter for each tile of the set.
Printing notes
23.9 cm³
Volume
29.7 g
Est. weight
5,292
Triangles
Prints as shown on its floor, no supports.
MAIN PURPOSE: Explore flow and draining in bath play
Bath cups that leak on purpose: a heart, a large hole and a pinhole in the floor pour three different streams, so toddlers see that a bigger hole empties faster. The grip foot lets the cups stack into a tower that drains from cup to cup.
Printing notes
31.1 cm³
Volume
38.6 g
Est. weight
1,364
Triangles
Print three; PETG for the bath. Prints as shown on its floor, no supports.
MAIN PURPOSE: Launch paper aeroplanes with a rubber band
Loop a rubber band over the notch at the tip, hook it under a paper plane's fold or a paperclip nose, pull back and let go: planes fly three times further and straighter than from a hand throw, so children can test which fold really flies best.
Printing notes
15.9 cm³
Volume
19.7 g
Est. weight
152
Triangles
Print in PETG. Prints flat as a plate, no supports.
Wraps-per-inch yarn gauge
MAIN PURPOSE: Identify the weight of an unlabelled yarn
Wind an unlabelled yarn round the stick between the notches, side by side without stretching, and count the wraps: 1 inch or 2 inches gives the WPI that tells lace from DK from chunky. Leftover and hand-spun yarn can be matched to a pattern without guessing.
Printing notes
6.5 cm³
Volume
8.1 g
Est. weight
2,248
Triangles
Prints flat as a plate, no supports.
Paper bead rolling fork
MAIN PURPOSE: Roll paper strips into jewellery beads
Slip the narrow end of a paper triangle into the slit, turn the handle and the strip winds into a tight bead around the 7 mm tine; dab glue on the tail and slide the bead off. Magazine pages become jewellery beads without the strip unwinding from a cocktail stick.
Printing notes
6.3 cm³
Volume
7.8 g
Est. weight
176
Triangles
Prints flat as a plate, no supports.