Is it suitable for children with autism? It seems to have some difficulty.

Yes, suitable for children who are new to 3d maze ball. Super fun, hours of entertainment if you have a kid that enjoys tinkering with puzzles!

Is it a birthday gift for 4-8 year olds?

Great gift for all ages. It will keep your kids busy for hours and away from the TV.

Does it come with the ball inside?

Yes. The entire puzzle actually has a clear hard plastic around the entire outside which you do not really see in the picture. The puzzle is hard and the small ball is not removeable.

How do you play?

There is a little Metal ball - find the start and get the bell there, then follow the maze, but don’t get lost, or fall

Does it very difficult？It's looks interesting.

Maze ball puzzle it looks easy, but it's hard! Maze Ball is a new style of ball puzzle game with more fun.