Reduce waste, be creative, feel good.
Step 1: It's Not Rocket Science
Keep the soft "waste": pasta wrappings, bottle wrappers, plastic bags, old fabric, etc. and stick it in a plastic bag.
Step 2: There
You've just made your very first softball, well done!
Now you're ready to inject them into some cool projects.
Have a look at my upcycled pouffe instructable to get an example of what to do with softballs: https://m.instructables.com/id/Upcycled-Pouffe/?ALLSTEPS
Thank you and happy DIY!