Though schoolchildren did not grace the streets of downtown Grass Valley Friday morning, the 129th annual Donation Day parade did march on. “I’ve been up since 5 a.m. checking the radar,” said Grass Valley Schools Superintendent Eric Fredrickson. “We had the band and buses ready to go, but the way our kids from Scotten walked to the parade and back, I was concerned that the kindergarteners and younger kids would end up in a storm and have to walk back to school in the rain.” Fredrickson’s decision kept those kids from getting drenched, as rain and snow fell around 10 …