the ladder

Ten levels. One box.

Each level adds a handful of components — never a whole new kit. By Level 10, a Wi-Fi board is driving parts you've owned since day one.

L1 Light

24 projects ready

Your first circuits — make light happen.

adds to the box:

3×AA battery pack (4.5 V)Solderless breadboardJumper wiresRed LED (5 mm)Yellow LED (5 mm)Green LED (5 mm)220 Ω resistor1 kΩ resistor10 kΩ resistorSlide switchPush button (tactile)

→ everything at Level 1

L2 Sound

19 projects ready

Add noise. Doorbells, alarms, annoying siblings.

adds to the box:

Active buzzer (3–5 V)10 kΩ potentiometer

→ everything at Level 2

L3 Sense

17 projects ready

Circuits that react to the world around them.

adds to the box:

Light sensor (LDR)Temperature sensor (10 kΩ thermistor)NPN transistor (2N2222)PNP transistor (2N3906)

→ everything at Level 3

L4 Motion

13 projects ready

Make things spin, wobble, and go.

adds to the box:

DC motor (3 V)Diode (1N4001)

→ everything at Level 4

L5 Control

projects coming

Precise movement you command.

adds to the box:

Micro servo (SG90)

projects coming as the ladder fills in

→ everything at Level 5

L6 Logic

projects coming

Chips that count, time, and decide.

adds to the box:

555 timer chip10 µF capacitor100 nF capacitor

projects coming as the ladder fills in

→ everything at Level 6

L7 Code

projects coming

Program everything you already own.

adds to the box:

Arduino-compatible board (Nano)

projects coming as the ladder fills in

→ everything at Level 7

L8 Environment

projects coming

Measure weather, soil, and the room.

adds to the box:

Temperature + humidity sensor (DHT11)Soil moisture sensor

projects coming as the ladder fills in

→ everything at Level 8

L9 Robotics

projects coming

Wheels + everything so far = robot.

adds to the box:

Motor driver (L293D)Gear motors + wheels (pair)

projects coming as the ladder fills in

→ everything at Level 9

L10 Connected

projects coming

Your projects, on the internet.

adds to the box:

ESP32 Wi-Fi board

projects coming as the ladder fills in

→ everything at Level 10