Grade 3 · Tinkercad · Lesson 43

Shape Stamp Set

Turn raised geometric patterns into repeatable printed textures.

Time2–3 × 60 minutes + adult printingTeamsTeams of 2–3EquipmentTinkercad + Bambu P1S fleet

Project inspiration · 3 images

See, build, and test

Use these images to understand the kind of making, details, and testing involved. They are inspiration—not designs students must copy.

Finished student example for Shape Stamp Set
01Finished project
Close construction and materials view for Shape Stamp Set
02Construction detail
Students testing and recording results for Shape Stamp Set
03Student testing

Student directions · Grade 3

What will you make and do?

You will make three related stamps that leave different, clear impressions in classroom clay. Each stamp needs a handle that is easy to hold.

Teacher overview: Students will plan the specific object described below, make and test a first version, then use their results to improve it. Read one step together, demonstrate the unfamiliar action, and let students complete that step before moving on.

  1. 1Plan your project

    Draw three bold patterns in one family, such as different leaves or geometric marks. Remember that the impression reverses the stamp face.

  2. 2Make the first parts

    In Tinkercad, make a flat stamp base and add raised pattern shapes. Keep details broad and separated enough to leave readable marks.

  3. 3Put it together

    Add a sturdy handle and duplicate the base for the other two patterns. Ask the teacher to check the joined shapes before printing.

  4. 4Test it fairly

    Press each stamp into the same clay thickness using a similar straight push. Record which details appear clearly over three impressions.

  5. 5Improve one part

    Change one shallow, crowded or hard-to-hold feature. Compare another impression with the original.

  6. 6Show and turn in

    Display the three stamps with labeled clay impressions, pattern sketches and an explanation of the revision. These are not food tools.

How will you know it works?

  • Three patterns are clearly different
  • Handle is easy to hold
  • Impression is recognizable and repeatable

Before you move on

Tell a partner what you are making. Point to the part you will work on next. Draw or dictate your test notes if writing slows you down.

Machine cutting, printer setup and electrical power-on require adult approval. A basic-materials model is a valid way to demonstrate the design when equipment is unavailable.

Keep your plan, test notes and before-and-after evidence with the printable design brief below. Use the detailed teacher plan and any coding guide for tool instructions. These steps continue across the lesson’s meetings, not all in one sitting.

For teachers

Engineering standards

This shows how the lesson connects to the national NGSS engineering standards and what student work you can collect.

Assessed

3-5-ETS1-1

Teams define the user or purpose and set measurable size, performance, material, and print-time limits before modeling.

What students show: Problem statement, criteria, constraints, measurements, and labeled sketch.
Practiced

3-5-ETS1-2

Students sketch and compare at least two possible forms before choosing or combining features for the digital model.

What students show: Two ideas and a criteria-based design choice.
Assessed

3-5-ETS1-3

Teams use a repeatable test—press each stamp into the same clay thickness with the same three-second press and compare clarity—identify a failure point, revise one dimension or feature, and retest.

What students show: Test data, version comparison, and evidence-based explanation.

Materials

  • Modeling clay and rolling guides
  • Cardboard stamp prototypes
  • Pattern examples from nature and geometry
  • Rulers or calipers
  • Graph paper, pencils, cardboard, clay, and tape for prototypes
  • Computer or tablet with educator-managed Tinkercad access
  • PLA filament; teacher sets a project-specific gram and print-time budget
  • Finished test objects appropriate to the lesson

Teacher preparation

  1. Create an educator-managed Tinkercad class and assignment link; students do not enter personal information.
  2. Prepare one navigation demonstration using drag, zoom, orbit, undo, and view cube.
  3. Set the build envelope, minimum wall thickness, minimum feature size, and maximum print time for the class.
  4. Create the file rule G3_43_Team##_v1.
  5. Prepare shared build plates and an adult review queue for dimensions, orientation, stability, material use, and safe slicing.

Step by step

How to teach it

Day 1 · 0–20

Define and measure

  1. Introduce the mission: Design a set of three handheld stamps that make clear, different patterns in modeling clay.
  2. Identify the user, criteria, constraints, and measurements that matter.
  3. Sketch two different solutions at approximately full size.
Day 1 · 20–60

Prototype and compare

  1. Build quick cardboard or clay versions.
  2. Compare both ideas against the shared criteria.
  3. Select or combine features and predict the likely failure point.
Day 2 · 0–15

Tinkercad skill warm-up

  1. Create a sturdy base and handle from boxes and cylinders.
  2. Duplicate, rotate, and arrange raised pattern shapes.
  3. Align pattern pieces and group them with the base.
Day 2 · 15–60

Build the digital model

  1. Place the ruler and enter important dimensions instead of guessing.
  2. Use align and group to create clean, intentional geometry.
  3. Inspect from top, front, side, and underneath; name the file correctly and submit for teacher review.
Day 3

Print, test, and improve

  1. An adult slices, approves, operates printers, and removes parts.
  2. Use the same test procedure each time: press each stamp into the same clay thickness with the same three-second press and compare clarity.
  3. Revise one dimension or feature in a new Tinkercad version and explain the expected improvement.

Assessment

  • Problem includes a user or purpose plus measurable criteria and constraints.
  • Two sketches show meaningfully different solutions.
  • Tinkercad model uses entered dimensions and purposeful tool choices.
  • Model meets the teacher's printability and material-budget checklist.
  • Test is repeatable and the revision responds to evidence.

Supports & extensions

  • Provide a Tinkercad picture guide and a starter file containing only basic reference shapes.
  • Use mouse practice, larger grid snap, and one new tool at a time.
  • Allow a student to direct a partner or teacher who performs fine cursor movements.
  • Offer measured template objects while preserving choices about form and features.
  • Extension: reduce material, add a moving fit, or create two size variants using parameters recorded on paper.

Safety & responsible use

  • Students do not touch hot ends, heated beds, or moving printer parts.
  • An adult handles slicing approval, printer setup, monitoring, part removal, and support cleanup.
  • Use only lab-approved PLA and teacher-managed accounts; never publish student names or designs publicly without permission.
  • Check finished parts for sharp strings, weak points, and small-piece hazards before use.
  • Printed parts are prototypes—not food-safe, medical, climbing, load-bearing, or life-safety products.

No-machine alternative

Build the final version with cardboard, clay, foam, paper tubes, reusable construction pieces, or teacher-prepared shapes. Keep the same measurements, criteria, fair test, evidence, and revision cycle.

Printable student design brief

The challenge

Design a set of three handheld stamps that make clear, different patterns in modeling clay.

Success criteria

  • Three patterns are clearly different
  • Handle is easy to hold
  • Impression is recognizable and repeatable

Constraints

  • For clay only—not food
  • Raised details meet the teacher's minimum thickness
  • All stamps fit on one shared build plate area

Engineer’s notes

Our user needs…
The measurements that matter are…
Idea A and Idea B are different because…
In Tinkercad we used…
Our test showed…
We changed… because…
Our next version would…
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