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Shapes Around Us (3D Geometric Property Scanner)

Source:

Place 3D wooden geometric solids (Cube, Sphere, Cylinder, Cone, Cuboid) on an NFC scanner platform. The smart display highlights number of faces, edges, and corners while an RGB LED illuminates matching shape facets.

Categorisation

Props & Materials Required

  • •Wooden 3D shape set (Cube, Sphere, Cylinder, Cone, Cuboid)
  • •NFC tag stickers on each shape base
  • •ESP32 controller with OLED display
  • •PN532 NFC reader module
  • •DFPlayer Mini MP3 module + 3W speaker
  • •RGB NeoPixel ring

Step-by-Step Instructions

1

Tactile Inspection

Feel the wooden shape (e.g. Cube). Count its flat faces, straight edges, and sharp corners with your fingers.

2

Scan on Smart Base

Place the Cube on the NFC reader platform. Speaker announces: 'CUBE detected! 6 flat square faces, 12 straight edges, 8 corners!'

3

Compare Curved vs. Flat

Scan a Cylinder. Speaker explains: 'CYLINDER! 2 flat circular faces and 1 curved surface! It can roll AND stack!'

4

Roll & Stack Test Game

Follow speaker prompts: 'Which shape has 0 corners and can roll in all directions?' Child picks and scans Sphere → Green LED celebration!

Why It Works & Notes

3D geometry requires connecting physical tactile features (flat vs. curved faces, sharp corners) with formal geometric vocabulary. Scanning the shape triggers audio explanation and visual LED highlights of its geometric properties.