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Craft stick catapult.

Craft stick catapult.

Carpentry

Carpentry

snake pencil holder from Nova Natural Toys - could a simpler version pretty…

snake pencil holder from Nova Natural Toys - could a simpler version pretty…

American-made, sustainable, and larger-than-life. These building boards let kids easily build (and rebuild) structures while stretching their imagination.

American-made, sustainable, and larger-than-life. These building boards let kids easily build (and rebuild) structures while stretching their imagination.

Downloadable Woodworking Plans | 31-DP-00951 - Magnetic Marble Run Downloadable Woodworking Plan PDF

Downloadable Woodworking Plans | 31-DP-00951 - Magnetic Marble Run Downloadable Woodworking Plan PDF

Rollbahn ("roller-run") color and movement toy, designed by Mike Ayres and Roger Limbrick, Switzerland, 1984, by Naef Spiele. The colored discs, with various designs and patterns, take almost a minute and a half to completely descend the zig-zag pattern of the frame, slowly mesmerizing with alternating shapes and visual trickery.

Rollbahn ("roller-run") color and movement toy, designed by Mike Ayres and Roger Limbrick, Switzerland, 1984, by Naef Spiele. The colored discs, with various designs and patterns, take almost a minute and a half to completely descend the zig-zag pattern of the frame, slowly mesmerizing with alternating shapes and visual trickery.

marble run

marble run

http://www.turbosquid.com/3d-models/wooden-toy-cars-trucks-3d-max/757774

http://www.turbosquid.com/3d-models/wooden-toy-cars-trucks-3d-max/757774

Reciprocate Gear Mechanism

Reciprocate Gear Mechanism

The Tusi-couple is a mathematical device in which a small circle rotates inside a larger circle twice the diameter of the smaller circle. Rotations of the circles cause a point on the circumference of the smaller circle to oscillate back and forth in linear motion along a diameter of the larger circle. The couple was first proposed by the 13th-century Persian astronomer and mathematician Nasir al-Din al-Tusi in his 1247 Tahrir al-Majisti.

The Tusi-couple is a mathematical device in which a small circle rotates inside a larger circle twice the diameter of the smaller circle. Rotations of the circles cause a point on the circumference of the smaller circle to oscillate back and forth in linear motion along a diameter of the larger circle. The couple was first proposed by the 13th-century Persian astronomer and mathematician Nasir al-Din al-Tusi in his 1247 Tahrir al-Majisti.