🎯 Learning outcomes
- Make working models (windmill, periscope, pulley) using simple materials
- Use basic tools (ruler, scissors, cutter with supervision, screwdriver) safely
- Repair simple household items: sewing a button, fixing a loose screw
Before you start: Making simple models.
📖 Explanation
Working models show science ideas: a paper windmill turns in the wind, a periscope uses two mirrors to see over walls, a pulley lifts loads with less effort.
Tool safety: cut away from the body, use a cutting mat, keep tools in place after use, and use cutters and screwdrivers only with adult supervision.
Simple repairs: sewing a button with needle and thread, tightening a loose screw on a chair, gluing a broken toy, re-stitching a torn bag seam.
A student in Jaipur builds a periscope from a juice carton and two small mirrors and uses it to see over the classroom window ledge.
✗ A model must look perfect to work well
✓ A working model needs correct parts and angles; neatness can be improved later.
🧪 Try this activity
Build a paper windmill, test it in front of a fan at different distances and record how fast it spins.
✍️ Question bank with answers
Tap an option to check multiple-choice answers. Open “Answer” or “Marking points” for the others.
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A periscope uses
Answer
C. two mirrors
Mirrors reflect light around obstacles.
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When using a cutter you should
Answer
D. cut away from your body with adult supervision
Safety first.
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To fix a loose button you need
Answer
C. needle and thread
Sewing reattaches the button.
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What does a pulley help us do?
Answer
lift heavy loads with less effort
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Name one tool used to tighten screws.
Answer
screwdriver
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Explain why the windmill spins faster nearer the fan.
Marking points
- Stronger air flow
- More force on the blades
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Describe how to make a periscope with materials, steps and how it works.
Marking points
- Carton, two mirrors, tape
- Cut windows at top and bottom
- Fix mirrors at 45° facing each other
- Light reflects twice to the eye
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Your chair wobbles. What will you check and do?
Answer
- Check for loose screws
- Tighten them with a screwdriver (with adult help)
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Draw a periscope and show the path of light.
Answer
- Two mirrors at 45°
- Light path from top window to eye
🎲 Practice more
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