Most pyramids have a square base and four triangle sides. Bob and his crew build the new Spring City square pyramid to house a new exhibition for the museum. After watching this segment have students build a pyramid with cubes.
Ask children if they have ever stacked blocks before, and what they created by doing so. Explain that pyramids are stone buildings built thousands of years ago. Show a picture of a pyramid that has four triangle sides that connect at a peak.
Focus the Viewing:
Tell the children they are going to watch a video segment from Bob the Builder. Ask the group to watch the machines add layer after layer of stone blocks to create a pyramid.
Ask the group to describe the pyramid they saw in the clip. Explain that pyramids can be created by starting with a big square, and adding a smaller square on top, and an even smaller square on top of that. Each layer is a little smaller than the one below it. Students may need a visual, like a picture of a layered cake, to clarify the idea of successive layers.
Bob Dedicated and hardworking, Bob is the resident builder for Fixham and Spring City. There is no job too big or too small for Bob and his enthusiastic team, who will always jump to assist their community in every way they can. Bob's optimistic attitude always shines through, especially when reassuring his team with his empowering catchphrase: "Can we build it? Yes we can!"™
Wendy Wendy is Bob's smart and dynamic building partner. Her specialty is electronics, and she's always coming to the rescue when there's electrical work to be done. With a quick wit and an eye for spotting a problem, Wendy is on hand to point the team in the right direction.
Leo Leo is Bob and Wendy's good-hearted apprentice who is eager to learn the tools of the trade. Easily distracted, Leo can sometimes cause the best plans to come clattering down all around him. But when he learns to slow down and concentrate, Leo shows everyone his potential to become a great builder.
The Machines Bob's loyal and devoted group of machines round out the team. They are sometimes good-natured and silly, and sometimes competitive and mischievous—just like real kids. They are all ready to leap into action, eager to help with the build, but usually hopelessly and comically make things worse. They always learn from their mistakes and work together as a team to fix whatever mess they've made.
The machine team includes Scoop—an enthusiastic digger with big ideas; Muck—a good-natured, sweet dumper; Lofty—a scientific-minded, overthinking crane; Roley—a fussy, fastidious steamroller; and Dizzy—a finicky but energetic cement mixer; Two-Tonne—a powerful truck who can pull anything; and Tiny—a construction crane and permanent fixture on Bob's big builds in the city.
Guide the students to build a pyramid out of classroom blocks, books, or cheese cubes like the one Bob and his crew constructed in the clip above. Illustrate how blocks can be stacked beginning with a large square on the bottom and adding successively smaller squares, layer after layer, to create a pyramid. Give students the opportunity to try different materials and test their designs.
Show the students a three-dimensional pyramid, for example, a wooden block. Count the shapes together - four triangles on the sides and a square on the bottom. Next, go on a hunt around the classroom to identify triangles.