ἀναπηδῆσαι πρὸς τὸν πάππον → jumped up on his grandfather's knees, sprang up into his grandfather's lap
P. κατάστεγος, P. and V. κατηρεφής (Plato, Critias, 116B, but rare P.).
roofed with stone: V. πετρηρεφής.