Have you noticed? Lego figures are getting angrier, according to new research.
A robot expert at the University of Canterbury in New Zealand examined six-thousand of the popular mini-figures.
Christoph Bartneck found the number of smiley face Lego's is decreasing and being replaced with angry faces and more weapons.
So, why do a study on this? Bartneck says looking at all those frowns could have a negative impact on how children play.
Lego representatives were not immediately available for comment. Lego group is the world's third largest toy manufacturer by revenue, after Mattel and Hasbro.
According to its web site, children around the world spend about five billion hours each year playing with Lego bricks.