Eras
2,381 blueprints available • 17 subcategories
Browse Subcategories
Scientific Revolution (1600–1760)
Industry 5.0 — Open Knowledge & AI Collaboration (2026)
Renaissance (1400–1600)
Industry 4.0 — Computers & Digital Automation (1960)
Industry 3.0 — Assembly Line & Mass Production (1913)
Industry 2.0 — Electricity, Steel & Oil (1870)
Industry 1.0 — Steam & Mechanization (1760)
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Middle Ages
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Blueprints (2,381)

Making Panpipes — A Row of Tuned Bamboo Tubes
by Woody
Prehistoric

Making a Musical Bow — The Oldest String Instrument
by Woody
Prehistoric

Aryabhata's Spinning Earth — A Torch, a Ball, and Day and Night
by Astro
Middle Ages

Zero and Place-Value — Build an Abacus and Count Like the World Does
by Mark
Middle Ages

Projectile Motion — Launch a Ball and Measure Its Flight
by Penny
Scientific Revolution (1600–1760)

Hooke's Law — Stretch a Spring and Find Its Stiffness
by Penny
School Projects 11-15

The Pendulum — Time a Swing and Weigh Gravity
by Martin
Scientific Revolution (1600–1760)

The Sand Reckoner — Count the Grains and Tame Huge Numbers
by Mark
Ancient

Air Has Weight — The Upside-Down Glass and Torricelli's Barometer
by Penny
Scientific Revolution (1600–1760)

Boyle's Law — Squeeze a Syringe of Air
by Charlie
Scientific Revolution (1600–1760)

Magic Squares — Arrange Numbers So Every Line Adds the Same
by Mark
Ancient

The Mercator Map — Peel an Orange and See Why Flat Maps Lie
by Mark
Renaissance (1400–1600)

Snell's Law — Measure How Light Bends (Laser and Protractor)
by Penny
Scientific Revolution (1600–1760)

Trigonometry — Build a Clinometer and Measure a Tree's Height
by Mark
Ancient

Galileo's Falling Bodies — Race a Ball Down a Ramp
by Penny
Scientific Revolution (1600–1760)

Kepler's Laws — Draw a Planet's Ellipse with Two Pins and a String
by Astro
Scientific Revolution (1600–1760)

The Number e — Grow Money and Meet the Constant of Change
by Mark
Scientific Revolution (1600–1760)

The Birth of Probability — Roll the Dice and Find the Odds
by Mark
Scientific Revolution (1600–1760)

Descartes' Coordinates — Plot a Treasure Map and Draw with Numbers
by Mark
Scientific Revolution (1600–1760)

Napier's Logarithms — Build a Paper Slide Rule and Multiply by Sliding
by Mark
Scientific Revolution (1600–1760)

Newton's Method — Chase a Root Down Tangent Lines You Draw
by Mark
Scientific Revolution (1600–1760)

Pascal's Triangle — Build a Pyramid of Numbers by Adding
by Mark
Scientific Revolution (1600–1760)

Al-Khwarizmi's Algebra — Complete the Square with Paper Tiles
by Mark
Middle Ages

Fibonacci Numbers — Count the Spirals on a Pinecone
by Mark
Middle Ages