aspen for hatchlings?

[Bristen]

I've noticed that most people keep hatchlings on paper towel or newspaper.. any reason for that?

I've recently purchased some females (not all have been received yet though), but some are quite small. I have some that are as small as 111g, but most will be over 200g and a few closet o 400g. Is there a minimum size they should be before using shredded aspen?

Just wondering what everybody's opinion is on that subject.. I currently have the smaller ones on newspaper, but would like to move them unto aspen if possible.

Thanks for your opinion!
Bristen.