What dose it need for a device to be considered a kind of computer

Micro controller or MCU (Microcontroller Unit)

Explanation:

Micro Controller Unit is basically a computer on a chip with all components fabricated onto it. It is the core component of a computer.

A Micro Controller has:

all fabricated on a single chip so that it may be connected via buses for providing the desired functionality.

there is no universally accepted definition of art. although commonly used to describe something of beauty, or a skill which produces an aesthetic result, there is no clear line in principle between (say) a unique piece of handmade sculpture, and a mass-produced but visually attractive item. we might say that art requires thought - some kind of creative impulse - but this raises more questions: for example, how much thought is required? if someone flings paint at a canvas, hoping by this action to create a work of art, does the result automatically constitute art?