THE LIGHT BULB WAS AN INVENTION THAT HELPED PEOPLE DO THINGS AT NIGHT

FIRST, AN INVENTOR MUST PERFORM AN EXPERIMENT TO TEST AN IDEA.

SCIENTISTS MAY TEST THIER IDEAS IN A LABORATORY USING SPECIAL EQUIPMENTM

ALBERT EINSTEIN WAS A GENIUS. EVEN VERY SMART PEOPLE LIKE TO ACT SILLY!

A SMALL GADGET WITH MANY PARTS,SUCH AS A WATCH , CAN BE HARD

THE INVENTION OF THE ELECTRIC FAN HELPS US TO STAY COOL IN HOT

A RED LIGHT IS A SIGNAL TO STOP. THIS INVENTION HELPS TO SAVE LIVES.

A GOOD INVENTION HAS AN OCCASIONAL PROBLEM BUT SHOUD NOT FAIL .