Tinker with one idea at a time

Pathfinding

How does a character figure out the best path?

Draw walls, pour water, and watch BFS and A* race to find the shortest path. Then try it yourself.

CIA Triad Tradeoffs

Confidentiality, Integrity, Availability. Pick two?

Drag three sliders and watch real scenarios react. See why pushing one pillar up can knock another down.

Common Port Numbers

Drill the port numbers the CCST exam asks about.

Browse, flashcard, or quiz yourself on the ports the CCST exam loves. Cleartext vs. encrypted, TCP vs. UDP.

Linux Permissions

Read, write, execute. Make the octal click.

Click rwx boxes, watch the octal update live. Run users at the file and see who gets allowed or denied.

Subnet & CIDR

See how a slash carves up an IP block.

Type an IP, drag the prefix slider. Watch the mask, network, and host range update bit by bit. Then quiz yourself.

Attack & Malware Vocab

Drill the named attacks the CCST loves to ask about.

Phishing vs. whaling vs. vishing. Virus vs. worm vs. trojan. Browse, flashcard, then quiz yourself on real scenarios.

OSI & TCP/IP Models

Seven OSI layers, four TCP/IP layers, one networking world.

Click through both model stacks, sort protocols and devices into the right layer, then drill yourself.

Wireless Security

WEP, WPA, WPA2, WPA3. What changed, what broke, what to use.

Step through every Wi-Fi security standard, browse the surrounding terms, then quiz yourself on which one uses which cipher.

Encryption & Hashing

Symmetric, asymmetric, hashing. Same algorithms keep showing up.

Compare the three big families side by side, browse the algorithms with their key sizes and status, then drill yourself on which one to use when.

Auth Factors & MFA

Know, Have, Are, Do, Somewhere. Why password + PIN is not MFA.

See all five factor categories, browse every auth method, then quiz yourself on which combos actually count as MFA.

Threat Actors & Motivations

Who attacks, and why they bother.

Compare every threat actor across skill, funding, and motivation. Then drill yourself on which one fits a scenario.

Risk & Vulnerability Mgmt

Threats, vulnerabilities, controls, and how to score them.

Pin down the core vocab, learn the four risk treatments, score a CVE with CVSS, and quiz yourself.

AAA & Security Frameworks

Authentication, Authorization, Accounting. Plus NIST, ISO, Zero Trust.

The three pillars of AAA, the frameworks that shape every program, and the principles that keep them honest.

Firewalls & Network Defenses

Stateful vs stateless. IDS vs IPS. NAT, DMZ, segmentation.

Every firewall generation, every network defense, with quiz scenarios for picking the right one.

PKI & Certificates

Trace a cert from leaf to root. Watch revocation break it.

Click through a real-looking certificate chain, browse every related term, then drill yourself on validation levels and revocation methods.

Incident Response

Six steps from getting ready to lessons learned.

Walk through the IR lifecycle, learn how real SOCs handle alerts, and drill yourself on which phase a situation belongs to.

Endpoint Security

Hardening a device, step by step.

Walk through how to harden an endpoint, learn the defenses by name, then drill yourself on which one is which.

DR & Continuity

Plan for the worst before the worst happens.

Set recovery targets, choose backup types, pick the right standby site, and test the plan.

Social Engineering

When the attack targets people, not computers.

Learn why social engineering works, recognize the common attacks, and drill yourself on spotting them.

Malware Types

Tell a virus from a worm from a rootkit.

Learn each malware family by behavior, then drill on identifying them from scenarios.

VPN & Remote Access

Working from outside the network, safely.

How a VPN protects a connection, what NAC does, and why MFA matters for remote logins.

Coding a Bot Brain

Experiment with code that drives your bot.

Your bot can run your code. Learn the brain commands, then play with ready-made snippets for chasing, kiting, circling, firing, and self-righting. Edit the code, press Run, and watch your bot fight a live opponent on the arena's real physics.

Closing the Loop

Why your robot overshoots, wobbles, and stops just short.

Tell a bot to drive somewhere and it misses. Measure how far off it is and feed that number back into the motor, and it does not. Tune the three terms of a real controller, watch the response curve, and find out why every thermostat, drone, and 3D printer runs this exact loop.

Forty Years of Computers

Every machine on this page still boots. Go and use them.

From a 1972 teletype that printed on paper to the desktop you use now. Boot each machine, open your own projects on it, and watch the same ideas get reinvented over and over.

Creature Skeletons

One rule, stay close behind, turns circles into swimming creatures.

The whole secret of Creature Lab in five steps. Drag one point and watch another obey a single rule, grow the rule into a chain, stop the kinks, wrap skin around the circles, then solve a leg with FABRIK one pass at a time.

The Finished Game

Eight weeks of math, running. Press M to see it think.

The platform game from the Build a Game Engine Out of Math course, with every system in place. Play it, then press M to watch the engine: hitboxes, velocity arrows, and the live triangle to the nearest coin.

Coordinate Clicker

Every single thing on a screen is just two numbers.

Click anywhere to see its two numbers, hunt down coordinates you are given, and find out why screen y grows downward when math class says it grows up.

Ghost-Trail Race

The gaps between the dots ARE the speed.

Race two runners that drop a dot every frame, and watch the spacing tell you the speed. Then find the one number that gets you anywhere in exactly the time you want.

Falling Table

Real falling is not one speed. It is a speed that grows.

Drop a ball next to its own frame-by-frame table and watch one column count up by the same amount every single row. That column is gravity.

Jump-Arc Designer

A jump is one number. Learn to pick it on purpose.

Step through a jump one frame at a time, measure jumps of different strengths, and find the rule that lets you pick a jump on purpose. The same two lines run every platformer ever made.

Flywheels & Spinners

The hidden physics inside every battlebot weapon.

Spin up a flywheel, watch it bank energy, and discover why a rim-weighted ring hits twice as hard as a solid disk. The same math runs your BotForge weapon.

Gear Ratios

Trade top speed for shove. Tune your drivetrain.

A gear is a trade: more reduction means more pushing force but a lower top speed. Race a bot, crank the gear, and feel why a sprinter and a bulldozer need different drivetrains. The same numbers run your BotForge bot.

Power Budgets

Why battlebot weapons brown out, and how to stop it.

Run a weapon off a battery and watch it drain. Find out why your weapons cut out mid-fight when they pull more power than the battery can recharge, and the three ways to fix it. The same math drives the Sustained Run stat in BotForge.

Center of Mass & Flipping

Why some bots flip on the first hit, and others shrug it off.

Find a bot's balance point, then shove it. Discover why heavy parts mounted low and a wide wheelbase make a bot nearly impossible to flip, while a tall top-heavy bot tips on the first hit. The same rule drives the Flip Resistance stat in BotForge.

Wheels vs. Tracks

Fast and nimble, or slow and unkillable?

Wheels are fast and nimble but fall apart when shot up. Tracks are slow and sluggish but keep driving when half their wheels are gone. Battle-damage two bots side by side and find the crossover where tough beats fast.

Impact & Mass

Momentum is mass times speed. And mass is a shield.

A ram hits with momentum: mass times speed. Heavy-and-slow can hit as hard as light-and-fast. And the same mass that makes your hit land also keeps you from being thrown. Ram a bot, change the weights, and feel the trade.

Cuckoo Clock Workshop

No motor, no battery. Open the case and run the machine.

A working 3D cuckoo clock with the case walls turned to glass. Wind it, speed up time, tune the pendulum, break the escapement, and find out how a wooden bird knows to call seven times at seven o'clock.

Hammers & Flippers

Swing for damage, or flip them out of the arena.

An arm is a lever. Swing a heavy head fast and a hammer caves a bot in; a flipper trades that damage for a launch that throws light bots clean out of the arena. Swing too big for your body, though, and you flip yourself.

Armor & Damage

Where you get hit decides how much it hurts.

Your health scales with weight, and a hit only counts for what reaches the chassis. Armor soaks most of it, a wheel eats some but can break, and a bare panel takes the full blow. Bolt on plate and watch your bot survive twice as long.

Electric Motor Workshop

A magnet, a coil, and a current. Open frame, no mystery.

A classroom demo motor you can actually get your hands into. Slide the magnets, dial the voltage, rewind the coil, slow time down to watch the commutator flip the current, then spin it by hand and light a bulb.