Good stuff
It was creepy in an odd way. I liked how the "boys" (because i dont know what else to call them) had different personalities and responded to the situation in different ways. Just kinda wierd when 1 of them isn't in touch with his "good idea, bad idea" and leaves the flash in whirlpool of strange.
Intro was nice. Coming in from the silly imaginary vehicle collision that suddenly made since when the viewer realizes its just kids in a sandbox. Clever, yet even more commendable when the audience also realizes you've set the unorthodox tone of the film that maintains a pungent level of strange throughout...
...And not a "Jee! why do my shoelaces keep coming undone?" strange either.