Free Printable 3rd Grade Engineering Activities

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Inventors & Problem Solvers Word Search

Inventors & Problem Solvers word search for Grades 3–5. Find 20 words on STEM, innovation, and character traits like resilience, perseverance, and confidence.

Engineering and Design Thinking Crossword Puzzle

Engineering and design thinking crossword puzzle for Grades 3–5. Vocabulary covers prototype, innovation, blueprint, and the engineering design process.

Engineering the Elements: Power from Water

Printable Grades 2–5 science worksheet on hydropower and renewable energy with 10 fill-in-the-blank sentences using vocabulary like turbine, generator, and hydropower.

Underwater Observation Robot Design Project

STEAM design project for K–6 students: sketch and label an underwater observation robot prototype for deep-sea research.

U.S. Military Aircraft Names Word Search

U.S. military aircraft names word search for Grades 3–4. Find 11 hidden words including Blackbird, Raptor, Warthog, and Reaper.

Design a Lifeboat or Life Vest

Printable design project for Grades K–6: students create a blueprint for a lifeboat or life vest for a cruise ship with labeled parts.

Skyscrapers

Printable 3rd grade engineering worksheet for a hands-on skyscraper design project including foundation, frame, and stability testing challenges.

Classroom Structure Design Project

Printable 3rd grade engineering worksheet: students redesign or design a classroom item by drawing blueprints, identifying materials, and explaining load and support.

Redesign Structures for Environmental Impact

Printable 3rd grade science worksheet asking students to redesign a human-made structure with less environmental impact and explain their choices.

Bridges: Design and Brainstorm

Printable 3rd grade engineering worksheet guiding students through bridge design with brainstorming, type selection, and labeled sketching activities.

Compression and Tension

Printable 3rd grade science worksheet on compression and tension featuring fill-in-the-blank questions and a hands-on building activity.

Buddy Up Train Crossword Puzzle

Train and railway vocabulary crossword for Grades 2–4. Learn terms like locomotive, conductor, track, and platform.

Structure Frames: Triangle Strength and Stability

Printable 3rd grade science worksheet on structural engineering: students explore why triangles strengthen frames, bridges, and tall structures.

Pulleys Word Search

Pulleys word search for Grades 3–5. Find 14 hidden words covering simple machines, including pulley, load, force, and compound.

Foundations in Structures

Printable 3rd grade science worksheet on structural engineering: comparing foundation types, designing structures, and exploring stability factors.

Future Transport Word Search

Future transport word search for Grades 3–5. Find 14 hidden words about innovative vehicles, including driverless car, hyperloop train, and flying car.