Simplify the following text for a Grade 6 native English-speaking person.
Original: When the series folded before its planned 2008 season , Stoddart 's involvement ceased , with the team entering the Indycar Series under the HVM name .
Simplified: The Champ Car series folded before the 2008 season . Stoddart 's team entering the IndyCar Series under the HVM name .