To classify objects according to observable properties like texture and weight, we can create the following categories:

1. Smooth Texture:
   • Glass
   • Plastic bottle
   • Ceramic plate
   • Marble countertop
2. Rough Texture:
   • Sandpaper
   • Brick
   • Tree bark
   • Sponge
3. Soft Texture:
   • Cotton ball
   • Feather
   • Pillow
   • Sponge
4. Hard Texture:
   • Metal spoon
   • Stone
   • Wooden table
   • Ceramic mug
5. Lightweight:
   • Balloon
   • Feather
   • Paperclip
   • Plastic spoon
6. Heavyweight:
   • Dumbbell
   • Brick
   • Cast iron skillet
   • Concrete block

Please note that these classifications are not exhaustive and can vary depending on personal perception and context.