Smart Child's 15 Puzzle game

Smart Child's 15 Puzzle game is an educational game for smart kids. It helps them learn and enhance their capability of solving problems and increase their IQ.
The "15 puzzle" is a sliding square puzzle.The 15 puzzle consists of 15 squares numbered from 1 to 15 that are placed in a 4×4 box leaving one position out of the 16 empty. The goal is to reposition the squares from a given arbitrary starting arrangement by sliding them one at a time.

Train your brain!