Can I make recycled paper foam like you get at a fastfood resauraunt?
something soft and comfortable, but that doesn't get hot if you lay on it for awhileNatural fibers if possibleMachine washable and doesn't hold stains easily.
I would say cottonIt's very soft to the touch and wool can tend to be scratchyIf wool itches adults, imagine how uncomfortable it is to a baby.
Actually, cotton or wool is the best for babies/children due to the fire hazardsAcrylics and man made fibers tend to melt in a fire and can adhere to the skinThat is why pajamas and sleepers for babies are made in special fabrics that are fire retardantGood luck in your search.
Acrylic yarn is easy to care for, basic wash and dry, no worries of fadingThe fibers tend to be soft and relatively inexpensive when compared to wool or some organic cottons.
The problem is removing the water from the paper pulp - commercially this is done with heat and pressure with a fairly complicated mold The only way I can think of doing it at home would be to use plaster molds that would suck the water outMaking the pulp as thick as possible but still flowing might require a deflocculant like water glass as is done with clay slip to reduce water content.