Wild Mass Guessing for Sid The Science Kid.
Sid will grow up to be his world's Bill Nye the Science Guy.Hey, why not?
Unbeknownst to Sid, his parents are obscenely rich.
They live in a post-apocalyptic worldBecause they live on a house-lined street with no one else there. Maybe they were some doomsday cult who managed to save themselves, but it explains why only those families go to such a well-stocked school with only four kids - their parents are our reaping all the food and goods now sitting around. Every day the kids through the motions of regular life.
The kids are actually in a special ed class.This could be an explanation on why there are only four students for besides the age they are at a special education class tends to have less students in it.