A cell is like a race track
The nucleus is like the guy who tells you to start the race because the race guy tells/runs the cars who are racing and the nucleus runs the cell.
The ribosomes are like the food stand because a food stand makes food for the people and the ribosomes make protein for the cell.
The power lines represent the mitochondria because the power lines give energy/power to the track and mitochondria gives the cell energy.
Lysosomes are like the trash bins because it is where waste is stored just like how lysosomes hold and break down waste in a cell.
The cell membrane is like the fence around the racing lanes because it keeps people off the track like the cell membrane keeps things out of the cell.
Cytoplasm is like the advertising of the track because it is everywhere just like cytoplasm is everywhere in a cell.