Book Cricket
Arduino is not just the chip, there is also the IDE that brings the same name and purpose. It’s open source and free, so you can use it on every microcontroller like the ones on Arduino boards. Here an example from India! Thanks [rahulkar] for submitting.
The project is a digital implementation of “book cricket game” which Indian students normally use to play in their childhood time. The heart of the project is 8 bit MCU from AVR family called ATtiny85. ATtiny85 are small and cheap microcontrollers which are convenient for running simple programs with low footprint. The software used for programming the MCU is Arduino.
If you’re interested there is a post on the [website] that explains all the step to build it, have a look!