Something I use and love is a chopping board and knife set:
https://www.josephjoseph.com/en-us/index-with-knivesIn terms of parts it has exactly the same as any other; 4 knives, 4 boards and a block.
It's simple but it's exceptionally well designed. Without meaning to sound like an informercial, I'll mention some of the improvements over the standard. Firstly, it's colour coded for improved food safety, with matching logos on the board to help understand the semantics of the colours. The knife blade sizes/shapes are matched with the food types and similarly coloured.
You can throw it all, including the block, in the dishwasher. The block is open ended to the bottom to allow it to drain (I hate those blocks that let damp, dirt and bacteria accumulate at the bottom of the knife holes). The block also holds the boards apart, to prevent spread of bacteria and allow them to air dry.
The boards can be flipped around, and the knives moved to match. This doesn't sound like much, but it reveals the designer having thought about the ergonomics of taking the board out and always using (and wearing down) the same side of the board. Allowing it to be flipped and the knives to fit into corresponding flipped sockets is actually pretty clever.
A lot of thought has gone into it and without adding any complexity (sensors, motors, extra parts) or much manufacturing cost, they've kept it simple and greatly improved upon the standard (and probably selling it with a much higher markup). It's an example of the kind of applied design thinking I appreciate.