Gorey, def. not for kids. Nice visuals, They have the power to manipulate blood as their weapon. Themepark prison. Battle royale prison. Ended with a cliffhanger.
While Deadman Wonderland might appeal to some, I personally find it to gory. A prison anime featuring weapons made of blood, this show's plot is not particularly evolved or complicated. If you are looking for violence and a taste of the macabre, I would check this anime out!