We use the SparkFun Tinker Kit (18577 purchased Nov 2023, to replace older kits).
This kit includes an Arduino Uno (a version of), breadboard, LEDs, motors, resistors and various components.
Arduino Documentation (Language Reference)
On our Windows 10 computers, we need these drivers, for the computer to recognize the Arduino board.
More documentation on FTDI drivers.
Tinkercad for our Summer Camp