The young spiders just waved.For several days and several nights they crawled here and there,up and down, around and about,waving at Wilbur, trailing tiny draglines behind them, and exploring their home.There were dozens and dozens of them.Wilbur couldn't count them, but he knew that he had a great many new friends.They grew quite rapidly.Soon each was as big as a BB shot.They made tiny webs near the sac.Then came a quiet morning when Mr. Zuckerman opened a door on the north side.A warm draft of rising air blew softly through the barn cellar.The air smelled of the damp earth,of the spruce woods,of the sweet springtime.The baby spiders felt the warm updraft.One spider climbed to the top of the fence.Then it did something that came as a great surprise to Wilbur.The spider stood on its head,pointed its spinnerets in the air,and let loose a cloud of fine silk.The silk formed a balloon.As Wilbur watched, the spider let go of the fenceand rose into the air."Good-bye!" it said, as it sailed through the doorway."Wait a minute!" screamed Wilbur. "Where do you think you're going?"But the spider was already out of sight.Then another baby spider crawled to the top of the fence,stood on its head, made a balloon, and sailed away.Then another spider. Then another.The air was soon filled with tiny balloons, each balloon carrying a spider.