3D Printing Junior Challenge: Introducing Scribble

This is the third in the series of recent 'Cookie Cutter' class project work.   School in New Zealand has now broken for the school holidays, we will be back in person in February, in the meantime we will be revisiting all of our 2025 project work and we have a range of prints and projects from the year which we we will be posting.   As always if you want to get in contact with the teacher who runs this blog you can do so by emailing him at myles.webb@gmail.com.

Challenge: For students to create an original, unique and working cookie cutter suitable for use.

Background: We have detailed this process over the past two days, detailing how the original inception and idea featured a tree shape.  

As the students started developing ideas a clear next step was going to be using the 'scribble' tool present in Tinkercad.   When selected with the students iPads it allows students to be able to freely draw on a seperate design page then bring this straight into Tinkercad.   This allows the students the ability to create a range of shapes and designs and the students have proven increasing adept at developing their skills to use this to produce different ideas.   In the case of this challenge the students started looking at traditional ideas and shapes associated with Christmas and then experimenting with them.  

Having already identified that early prints lacked a handle and tended to be too thin this student wanted to make sure that this print addressed both these potential issues.

Level of Difficulty: Low - this is a straightforward design that took the students a few minutes to independently produce as a eight year old.

Size: The print is 90mm wide 70mm high and has sides that are 10mm thick and 10mm high.

Cost: The print has a PLA use of 13g and an associated cost according to Bambulab of $0.31.

Timeframe: The print using the Bambu H2D took 38 minute to complete.   This makes this project an excellent challenge based around the concept of printing a class set or a large group of prints as the timeframe makes it somewhat realistic (with our classroom we are attempting to complete the entire run using a single printer over the course of a week at school)

What we would do differently/next steps for the students: The run of prints in this sequence were based around tree designs, this version was the first 'scribble' tool designed version and it was printed as it was intended to share with the students a different approach.   The handle while it is functional needs some more refinement.   The student also has created 'sections' for the hat that are quite distinct.  In testing when the students use the cutter to cut through the play-doh if the students cut right through it does not leave a single piece, but it leaves the design in two distinct sections - so the students need to engineer a solution to be able to  press it trough some of the way, but not completely through so the shape remains intact.    

This will be updated with further versions of this print later.   You can also see the 2025 Christmas themed slideshow featuring ten years of different Christmas Designs and Challenges for students by clicking on the link here.