How do I use clear Christmas balls?

There are a bunch of ideas here: https://happydealhappyday.com/clear-plastic-ornament-balls/

I've filled them with dried flowers from special arrangements. A fun way to keep them forever!

Roll a photo of friend or relative's house that you cut out. Stick in the top and let it unroll. Add artificial snow and tie a ribbon around the hanger. Cool gift.

Hi,I would dip them in gold or silver glitter and then string them into a circle. I would stack circles on top of each other as I create them a little smaller than the first. Stack them. Add some greenery also the faux votives or a faux pillar candle in the middle of the concentric circles. Voila!

For what?

Remove the caps and stick stuff in the little hole, like glitter, feathers, etc. Replace the caps, add a hook and hang.