Wilbur is a kid who doesn't exist yet. He was born on the year 2024 according to his age in 2037. He visited the past (30 years back) to set things right for his present.
Wilbur went back in time to when his father, Lewis, was a 12 year old kid. He warned him of a tall man in a bowler hat who had taken a time machine because Wilbur forgot to lock the garage door to his house.
And because of this the whole story is set and Wilbur tries to fix it