I have a custom object called Pencil Box and Pencils. They have a one-to-many relationship(Pencil Box is a parent and Pencil is a child).  
I want to create a TextField where you enter the name of the Pencil Box and the program outputs you all the pencils that this Box has.
For example:
Pencil Box: Wooden(Black, Yellow, White), Fur(Blue, Green, Purple)

If I enter Fur the program should output the following  
Blue, Green, Purple

I have a custom object called Pencil Box and Pencils. They have a one-to-many relationship(Pencil Box is a parent and Pencil is a child).  
I want to create a TextField where you enter the name of the Pencil Box and the program outputs you all the pencils that this Box has.
For example:
Pencil Box: Wooden(Black, Yellow, White), Fur(Blue, Green, Purple)

If I enter Fur the program should output the following  
Blue, Green, Purple