The 2008-2009 WSU Family Series just sent out their lineup for this year. The first show offered is The Little Mermaid performed by the Missoula Children's Theater. There are two shows at 3pm and 7pm on Saturday, October 4. Tickets prices are $6.50 for adults and $4.50 for kids.
I just checked www.beasley.wsu.edu and it said "tickets soon." Keep the rest of us posted if you see that the tickets become available.