"Things" can refer to a wide variety of objects, concepts, or topics. Here are some different categories of things that might be included under this term:
Objects
Furniture: chairs, tables, desks
Technology: smartphones, computers, cameras
Clothing: shirts, pants, shoes
Household items: dishes, towels, pots and pans
Vehicles: cars, bicycles, boats
Toys: dolls, action figures, board games
Tools: hammers, screwdrivers, saws
Concepts
Ideas: freedom, justice, creativity
Emotions: love, fear, happiness
Events: birthdays, holidays, meetings
Processes: digestion, photosynthesis, learning
Systems: economic systems, educational systems, biological systems
Topics
Sciences: physics, chemistry, biology
Arts: music, painting, sculpture
Literature: books, poems, plays
History: events, people, periods
Sports: teams, competitions, equipment
Abstracts
Principles: equality, diversity, sustainability
Values: honesty, integrity, respect
Qualities: kindness, intelligence, bravery
Phenomena: weather, dreams, memories
If you have a more specific context in mind for "things," please provide additional details, and I can give you a more targeted explanation.