Newspaper is too slick and can cause spraddle leg. A very popular way is to use pine shavings, but cover the shavings for a couple of days with paper towels so they learn what is food. I've seen postings on here where chicks have died because of eating a lot of the shavings. It is rare, but I believe it could happen. Don't use cedar as the oils give them respiratory problems.
You can actually use newspaper, but you have to cover it with something to give them good footing. You can put window screen or 1/4" hardware cloth over newspaper. I saw where someone used porous shelf liner. With these, you just rinse this covering off when you change out the newspaper.
If you can make sure it will not cause a draft from underneath, you can use 1/4" hardware cloth so he poop goes straight through.
PS: I can't count the posts since I started typing.