AND gate facts for kids
INPUT  OUTPUT  
A  B  A AND B 
0  0  0 
0  1  0 
1  0  0 
1  1  1 
The AND gate is a logic gate that outputs 1 (true) only when both of its inputs are 1 (true). Since 0 is false, AND outputs the product (result of multiplication) of its inputs. That means that if either or both of its inputs are 0, the output will be 0 (zero multiplied by any real number is zero).
Symbols
There are three symbols for the AND gate:
MIL/ANSI Symbol  IEC Symbol  DIN Symbol 

Images for kids

AND gate using diodes

AND gate using transistors
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AND gate Facts for Kids. Kiddle Encyclopedia.