Updated from the old version (others): Received great ideas from our customers and adopted in this upgraded kit. Removed useless modules like light cup and mercury module, heartbeat sensor, two of the hall sensors, one of the dual-color sensor. Add useful modules like GY-521 accelerometer module, LCD1602 screen, DS1307 real time clock module etc. Upgraded tutorial only for R3, MEGA2560 R3, NANO in CD, listing paper, resistors pack only from Elegoo Team. There are tutorials in the CD that comes with. If you prefer download the tutorials online from the official website 100% compatible with Arduino official IDE, Raspberry Pi and STM32. Note: To use Elegoo starter kits requires basic electronic knowledge. If the user has no experience, it would be better to have someone lead and teach them while studying.