Pictoblox coding – Finger Tracing with AI (teachers)

Yann KIDSHAKER 19 mars 2026

Finger Tracing with AI

Objectives

After this lesson, students will be able to:

Access their device camera by writing code in PictoBlox.
Analyze the images captured from their device camera.
Build projects that detect human body parts from the device camera using a new extension in PictoBlox called Human Body Detection.
Write a script to track the position of their finger as it moves around and display them on the stage of PictoBlox.

Introduction

In this session, we introduce students to the concept of tracking ex: cricket ball in matches, but specifically to the concept of tracking human body parts; for applications like gaming, security, sports, etc.

For this we introduce the Human Body Detection extension in PictoBlox and guide the students to build an activity using blocks from this extension, where they can track their finger on the stage of Pictoblox using their device camera. This is done with the power of AI.

Activity

Tracking your finger on the stage of Pictoblox using AI.

Teaching Resources

PicoBlox Code

Title	Description	File
Finger Tracing with AI	Tracing your finger on camera using the Human Body Detection extension	https://ai.thestempedia.com/wp-content/uploads/2022/03/finger_tracing.sb3

Timeline

Title	Approximate Duration	Procedure	Reference Material
Introduction to tracing, human body parts tracing and some applications	10	Access and play the *Finger tracing with AI* *Lecture Slide*. Explain the following as introduction : What is tracing? Examples of tracing: cricket ball. Tracing human body parts. Examples of human tracking ( for security, gaming etc.) .	Lecture Slide
Activity: Finger tracing with AI	30	Ask students to open the PictoBlox on the computer. Demonstrate the procedure given in the *Finger tracing with AI* to the students. Ask the students to follow the instructions to create the project. At the end of the activity, the teacher must check if all the students have created the project and provide feedback accordingly.	Lecture Slide, PictoBlox File and Activity Sheet
Concluding the session	5	Make sure that all the students save their script properly before closing PictoBlox. Give a summary of the points covered in the lecture.	Lecture Slide

Title

Approximate Duration

Procedure

Reference Material

Introduction to tracing, human body parts tracing and some applications

Access and play the Finger tracing with AI Lecture Slide.
Explain the following as introduction :
1. What is tracing?
2. Examples of tracing: cricket ball.
3. Tracing human body parts.
4. Examples of human tracking ( for security, gaming etc.) .

Lecture Slide

Activity: Finger tracing with AI

Ask students to open the PictoBlox on the computer.
Demonstrate the procedure given in the Finger tracing with AI to the students.
Ask the students to follow the instructions to create the project.
At the end of the activity, the teacher must check if all the students have created the project and provide feedback accordingly.

Lecture Slide, PictoBlox File and

Activity Sheet

Concluding the session

Make sure that all the students save their script properly before closing PictoBlox.
Give a summary of the points covered in the lecture.

Lecture Slide

Things to Remember

Before Class

Make sure each PC has the latest version of PictoBlox installed and running.
Please see to it that web cameras on devices of all the students is working. Help them in setting the appropriate camera options if needed.

During Class

If the students are unable to find a block, point them to the color of the block on the block palette.
Make sure they write the script by selecting the appropriate sprite.

After Class

Make sure students save their codes/scripts.
Make sure they shut down the PC/Laptops.