Box No. 085 is open · a new glass box every day. Play, read, and see its history.
Hip baths, mud packs, fasting and sunshine: naturopathy heals without medicines, and Gandhi was its biggest fan. Walk its 200-year story from a Silesian water cure to Urulikanchan, see its five-element model as it tells it, then watch what hot water, cold water and a 3-day fast really do inside you, and where the evidence stands.
No box matches that yet. Suggest it as a future box →
The rules behind every box: 27 so far, each with a model to play with and everyday examples.
All laws, principles and concepts →V = I × R
Seen in AirFryerClear, FanClear, UPSClear +4
P + ½ρv² = constant
Seen in FanClear, ChimneyClear, CarClear +3
F = m × a
Seen in CarClear, MotorcycleClear, CycleClear +6
Energy in = energy out
Seen in CarClear, CycleClear, MicrowaveClear +7
ΔU = Q − W
Seen in CarClear, MotorcycleClear, ACClear +5
PV = nRT
Seen in LungsClear, CarClear, MotorcycleClear +5
ℰ = −dΦ/dt
Seen in UPSClear, MicrowaveClear, FanClear +5
P = F ÷ A
Seen in CarClear, MotorcycleClear, CycleClear +5
F = k × x
Seen in PenClear, WasherClear, CarClear +6
q = h × A × ΔT
Seen in AirFryerClear, FridgeClear, WaterHeaterClear +6
v = f × λ
Seen in PianoClear, GuitarClear, FluteClear +7
n₁ sin θ₁ = n₂ sin θ₂
Seen in CameraClear, EyeClear, TVClear
fuel + O₂ → CO₂ + H₂O + heat
Seen in CarClear, MotorcycleClear, ChimneyClear +2
π = iMRT
Seen in ROClear, KidneyClear, IntestineClear +1
a = Δv ÷ Δt
Seen in CarClear, MotorcycleClear, CycleClear +2
F = m × a
Seen in CycleClear, CarClear, MotorcycleClear +3
m = F ÷ a
Seen in CarClear, MotorcycleClear, CycleClear +1
p = m × v
Seen in CarClear, MotorcycleClear, CycleClear +1
W = F × d · P = W ÷ t
Seen in CarClear, MixerClear, FanClear +3
F = μ × N
Seen in CarClear, CycleClear, MotorcycleClear +3
F = G m₁ m₂ ÷ r²
Seen in CycleClear, CarClear, HeartClear +2
P = F ÷ A
Seen in CycleClear, CarClear, ROClear +4
F = ρ × V × g
Seen in WaterHeaterClear, ROClear, ACClear +1
τ = F × r
Seen in CarClear, CycleClear, MotorcycleClear +3
F = m v² ÷ r
Seen in WasherClear, MixerClear, FanClear +3
F = q v × B
Seen in MRIClear, FanClear, MicrowaveClear +5
I = Q ÷ t
Seen in UPSClear, FanClear, TVClear +4
You use them every day.
Most of them are black boxes.
So every day, we open one.
An interactive model that runs in any browser. Change one thing and watch cause turn into effect.
The idea in six short beats, plus a 40-second video. No jargon you won't get a definition for.
Every box is its own public repo, MIT licensed. Read how it's built, remix it, teach with it.
Words worth knowing
6 Jul 2026 → 5 Jul 2027
opened sealed
Our promise
Not in how things work, not in our code, and not in what we measure. We count visits with Google Analytics and filter out bots with ClickTrust, and we tell you exactly what that means.
Tomorrow: box No. 086
A short video every evening where you already scroll. The full, playable box is always here.
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