In a huge mobile planetarium, hundreds of Head Start preschoolers experienced the night sky with help from Sesame Street characters. PNC’s ‘Grow Up Great’ project, intended to infuse millions of dollars into Head Start in several states over a 10-year period, now features a traveling planetarium large enough for 30 preschoolers and 10-15 adults. Recently, the planetarium and PNC educators visited St. Michael’s Head Start in Allentown and SPARK in Bethlehem. In advance, teachers received curriuclum and suggested book titles to prepare the children.