1、Multifunctional: This development board kit is versatile enough to implement fun innovative works through for Python graphical programming, and the variety of sensors included promotes students' interest in science and technology. 2、Easy To Carry: This development board learning kit comes with an organizer box for easy storage, which is small in size and light in weight, making it very convenient to carry around and use. 3、Excellent ABS Material: This development board basic learning kit is made of excellent ABS material, which is sturdy and abrasion resistant, not easy to be damaged, and has a long service life. 4、Multiple Accessories: This development board starter kit has a variety of accessories, there are different kinds of sensors, LEDs, etc., different sizes of resistors, digital tubes, etc., which can meet your different needs for use. 5、Wide Application: This hardware programming learning kit has a wide range of applications, which can be used for educational courses, programming learning, and innovative production. Item Type: Development Board Kit Material: ABS Plastic 6 x AA Battery Box: 1.5V AA Battery x 6(Not Included) 2 x AA Battery Box: 1.5V AA Battery x 2(Not Included) 1 x Expanded Board 2 x Digital Pipe (4 Digit x 1, 1 Bit x 1) 4 x  Sensor (Water Level x 1, Soil x 1, Human Body Infrared x 1, Sound x 1) 1 x 1602 Display 1 x Ultrasonic Module 1 x Single 5V Relay 1 x USB Cable 1 x 8x8 Dot Array 2 x Chip (L293D x 1, 74HC595 x 1) 1 x Adjustable Potentiometer 6 x Switch (Ball x 2, Key x 4) 1 x S8050 Triode 2 x Sensor Element (Temperature x 1, Flame x 1) 2 x Buzzer (Active x 1, Passive x 1) 4 x Yellow Keycaps 43 x Resistor (51Ω x 5, 220Ω x 10, 1K x 10, 2.4K x 8, 10K x 10) 30 x LED (Yellow x 10, Green x 10, Red x 10) 1 x RGB Light 1 x Motor 1 x Servo 3 x Photoresistor Elements 1 x Fan Blade 1 x 6pcs AA Battery Box 1 x 2pcs AA Battery Box 1 x Resistor Card 48 x Jump Wire (3P x 5, 4P x 3, Male to Female x 40) 30 x Breadlines 1 x Breadboard 1 x Plastic Box