Your kids are very special for you and you want to give them the best nursary and for that nursery fabrics should be first on the list.
There are many kinds of different things that you can put in their room. But since your kids are young and delicate you should make sure you buy things in accordance to them. For example if you have a baby girl you can get everything in the color pink like a pink cradle, and pink cot, soft pillows, and blankets, with girly designs and pink curtains for nursary fabrics and lots of stuffed toys.
For baby boys you can get everything in the blue like a blue cradle, and blue cot, soft pillows, and blankets, with boyish designs and blue curtains and lots of stuffed toys be careful that your baby is not allergic to anything.
For kids at the age of two or three, let them choose things themselves but make sure and check if they are safe for them. Show them stuff that will help them learn things for example a carpet with ABC and curtains with 123 and other stuff. Let them choose toys but make sure that they are safe for them, not toys that can hurt them. If you are going to paint their room then choose a nice color or the nursery fabrics that they choose.
And if you are going to use wall paper then use ones with for example pictures with names of what they are under them or ABC or even 123 ,flowers, animals. You can also choose cartoons characters from the cartoons they most watch or pictures of nursery rhymes or even their favorite story books. Pictures of Barbie’s for girls and cars for boys. Most important is that they like the room. Buy a nice bed shaped like a car for a boy and a pink bed for a girl. Buy nice pillows and blankets and nice bed sheets and pillow covers .But most important is what they are comfortable in.