Hey,
An idea that might be not so complicated to implement:
I’ve got a component containing a list of items (e.g. other components of the same type).
I want the users of this component to be able to set the quantity of these items - for example the default state would be 3, but I would also like to allow them to display 15 or 50 if needed. 

It could be either
1. A way to display X children of a component that exist in that component but are hidden
2. A generative way to populate the component with X children inside.