How to make it so that the children elements will never wrap to the next line even though the parent element's width may be small for them?

How to make it so that the children elements will never wrap to the next line even though the parent element's width may be small for them? I want them to be overflowed (e.i. overflow: hidden). I need this for a photo preview system (thumbnails) I am building. Currently the children elements are left-floa开发者_Python百科ted.

I found a generic solution in a forum. Link to the answer

And as Dan said, we would need to see the HTML and CSS for this..