No doubt the first day of school can be traumatic for kids. In Nursery School Musical, we see its stressful for overly ambitious parents, too. Fresh from a successful turn at the 2008 Toronto Fringe Festival, Nurseryis making its U.S. premiere with this production. The satire takes a hard (and hilarious) look at parents who think getting into the right college starts with getting into the right preschool. 8 p.m. Wednesdays, Fridays and Saturdays. 5 p.m. Sunday, March 15. Through March 21. Theater LaB Houston, 1706 Alamo. For information, call 713-866-7516 or visit www.theaterlabhouston.com. $25.