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Playing with Lines (Smart Line-Tracking Drawbot)

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Children draw different types of lines (straight, slanting, zigzag, curved) on paper using black markers. A 2-sensor IR line-following robot drives along their lines, emitting distinct musical tones for each line orientation.

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Props & Materials Required

  • •White poster paper sheets
  • •Thick black permanent markers
  • •Line-following robot car (2-wheeled mini chassis)
  • •Dual IR reflectivity sensors (TCRT5000)
  • •Arduino Nano / ESP32 controller board
  • •Piezo buzzer or mini speaker

Step-by-Step Instructions

1

Draw Line Pathways

Draw a thick black line path on poster paper using straight horizontal lines, slanting diagonal lines, and smooth curves.

2

Place the Linebot

Place the IR line-tracker robot at the start of your line path and switch it ON.

3

Observe Line Following

Watch the robot use dual IR sensors to steer along the black line track automatically.

4

Line Type Audio Feedback

As the robot navigates a curved line vs. a sharp slanting zigzag, the speaker plays pitch-changing musical notes indicating line curvature!

Why It Works & Notes

Lines become active pathways when a robot follows them! Drawing horizontal, vertical, slanting, and curved lines to guide a robot makes geometry kinesthetic and introduces foundational robotics line-tracking principles.