Stanley and his parents had tried to pretend that he was just going away to camp for a while, just like rich kids do. when stanley was younger he used to play with stuffed animals, and pretend the animals were at camp. camp fun and games he called it. sometimes he'd have them play soccer with a marble. other times they'd run an obstacle course, or go bungee jumping off a table, tied to broken rubber bands. now stanley tried to pretend he was going to camp fun and games. maybe he'd make some friends, he thought. at least he'd get to swim in the lake.

in what way does the author reveal details about stanley in this excerpt?