Helicopters Puzzle Challenge is perfect choice for jigsaw puzzle lovers. Solve all puzzles and keep your brain sharp. You have three modes for each picture, easy, medium and hard. There is no time limit so you can have a leisurely experience. Have fun playing. jigsaw puzzles, helicopter puzzles, brain training, puzzle game, mobile puzzles, kids puzzles, brain games, cognitive skills, puzzle challenge, helicopter, jigsaw, fun games, educational games, online puzzles, free puzzles, relaxing games, mental exercise