4.1 Establishing Functions

Table 1:List of identified functions.

Sl. no.	Functions
1.	Store the keys and coins
2.	Hold the keys
3.	Lock/unlock the box
4.	Indicate if the box is locked or unlocked
5.	Provision to solve the puzzle.
7.	Identify the right input
8.	Indicate if the input is correct

4.2 Function Tree

4.3 Morphological Chart

4.4 Generated Concepts

Design 1:

Design 2:

Design 3:

Design 4:

Pinball puzzle box

Design 5: