The Go Buffalo Rodeo continues through December 1. Today, however, is the Children's School Educational Rodeo, and attending might be more than fun. Many of these inner-city Catholic schoolchildren come from the 800,000 Hispanic-Americans in Harris County. You might want to offer some support for their education. Or, you could just go out for a fine show and fajitas, gumbo and Native American fry bread. 10 a.m.-1 p.m. today. Johnny Nash Indoor Arena, 6200 Willardville (near Almeda-Genoa and Mykawa), 995-5780. $10-$100.