Innholdsfortegnelse for February 2017 i Click Science and Discovery Magazine for Preschoolers and Young Children

Dig the ground. Dig the ground. Bore down in the mud. Shove the piles in one by one. Fill the holes. Fill the holes. Let the concrete drop. Spread it fast before it sets. Hoist the wood. Hoist the wood. Chain and hook and strap. Swing it round, then lower it down. Cut the planks. Cut the planks. Measure, mark, and saw. Earmuffs will protect your ears. Build the frame. Build the frame. Hammer all day long. Make the stairs and floors and walls. Raise the roof. Raise the roof. Drive the screws in now. Power tools will do the job. Build the sides. Build the sides. Fill the doors in too. Lift the windows into place. Lay the pipes. Lay the pipes. Twist and turn and click. Run the…

What you need 7 or more straws yarn or string What you do Thread four straws on to a long piece of yarn and tie the ends tight to make a square. Do the same with three straws to make a triangle. Make more shapes if you have extra straws. Lay the shapes down on a table, and press on their sides and corners. Which moves the most? How hard do you have to push before each shape bends or wiggles? What happens The square collapses and slides from side to side easily. The triangle changes shape less. Shapes that move less are stronger and more stable. They make things built with them stronger too. Builders often use triangle shapes to give strength to the inside core or outside frame…

My pop is building the Golden Gate Bridge. Almost every day after school, Charlie Shu and I go to Fort Point and watch. The bridge will stretch across the bay, from San Francisco to Marin. People said it was impossible. This bridge couldn’t be built. The bay is too deep, the currents too strong, the winds blowing in from the ocean too fierce. But I know my pop can do it. Whenever I say he’s building the bridge, Mom laughs. “There’s a crew of more than a thousand men working on that bridge, Robert. Including Charlie’s dad,” she reminds me. I know that, but to me, it’s Pop’s bridge. Pop’s a high-iron man, balancing on the slatted catwalks, spinning and bending the cables. He climbs so high that sometimes clouds…

A wooden plank across a small stream makes a fun bridge. But a long bridge for lots of people and cars needs to be built especially strong so it will never sag or break. The Golden Gate Bridge in San Francisco is nearly two miles long and hundreds of feet high. It’s built to be long and strong. Under the water, its two tall towers stand firmly on the hard rock at the bottom of the bay. Long, thick steel cables hang over the two towers. They stretch from one end of the bridge to the other. On land on each side of the bay, the cables are anchored into tons of heavy concrete so they do not slip. What holds up the road and the cars? Hundreds of smaller…

Grateful acknowledgment is given to the following publishers and copyright owners for permission to reprint selections from their publications. All possible care has been taken to trace ownership and secure permission for each selection. “The Right Tool for the Job” art © 2003 by Amy Wummer. Excerpt from Construction by Sally Sutton, illustrations by Brian Lovelock. Text © 2014 by Sally Sutton. Art © 2014 by Brian Lovelock. Reproduced by permission of the publisher Candlewick Press, Inc., on behalf of Walker Books Australia. “Build It High, Long, Strong” art © 2003 by R. Thornburgh. Excerpt from Pop’s Bridge by Eve Bunting, illustrated by C. F. Payne. Text © 2006 by Eve Bunting. Illustrations © 2006 by C. F. Payne. Used by permission of Houghton Mifflin Harcourt Publishing Company. All rights reserved.…

Big and Small Bald eagles are big birds, and they build huge nests. First, they choose a strong tree. Then they lay sticks on top of one another. They add more sticks to the nest year after year. Bee hummingbirds are the smallest birds in the world. Their nests are the size of a golf ball. What are they made of? Moss, lichen, and bits of bark. Females weave the materials together with strong, stretchy spider webs. Made of Mud Flamingos nest in large groups. The male and female work together to make a tall muddy mound. Then the female lays just one egg. Like flamingos, cliff swallows live in large groups. But they build their mud nests on the side of steep cliffs. These birds lay dried grass inside…

Many bridges are built over wide bays and deep rivers. How do workers build the part of the bridge that is under the water? One way is to lower a large steel box called a caisson down to the bottom of the bay or river. The caisson is very tall. Its top reaches above the surface of the water. When the water inside the caisson is pumped out, the construction crew has a dry place to work. The bottom edge of the caisson is sharp. As the workers dig and dig, the heavy caisson sinks into the dirt and mud. The workers dig until they reach solid rock. Then they come out and the caisson is filled with concrete. When the bridge is built on this concrete foundation, it is…

Directions 1. Cut out the house and roof along the dotted lines. 2. Fold along all the solid gray lines on the house and roof, keeping the lines on the outside. 3. Glue tab A to the inside of the other edge of the house. 4. Glue the four tabs marked B to the roof. You’ll need to reach your hand inside the house to push the roof and the tabs together. 5. Your house is finished! Building the walls of a house Carpenters build a wooden frame that acts like the skeleton of the house. Plumbers and electricians put in pipes and wires that carry water and electricity to whichever rooms they’re needed. Workers fill the spaces between the wood with pink insulation. The insulation keeps the house warm…