There is a scene maybe 14-18 minutes into the film where someone is tattooing a child with a tattoo gun. The child seems to want the tattoo, but he winces and bleeds a little. It doesn’t seem like he is being tattooed against his will, but he is like, eight to ten years old.
Very briefly in the beginning of the film, during the swimming scene, the little boy is having a hard time swimming. Then about 48 minutes in, two characters gasp for breath after being submerged underwater for maybe a minute.