![]() For the 3D-printed box, you can introduce the principle of probes and more accurate measurements with the help of small rod magnets.If needed, students improve their models if the predictions did not match their observations and draw their improved model on paper. Students test their predictions and note down their observations.For example: “If there is a square inside, I should hear 4 clicking sounds when I turn the mystery box one full turn.” These ideas should be predictions about the behaviour of the boxes in a certain experiment, based on their model. Then, they come up with ideas to test each other’s model. Now 2 pairs of students with different drawings work together.Here, students observe the sound the ball makes when moving the box. Let the students study their mystery box and instruct them to come up with a model of its internal structure.Ideally, every pair of students gets one mystery box. Prepare mystery boxes with the easiest internal structures: triangle, square, line, or an empty base for the 3D-printed mystery box, and square, circle, or line for the LEGO mystery box.There are different ways to use mystery boxes in your classroom. Depending on the age and level of your students, you can adapt the activity to different difficulty levels. lid: LEGO build plates can be used to seal the box so that the structure and the ball cannot be observed directly.ball: a ball is placed inside the structure of the base.Regular sized LEGO can be then used to build an internal structure on top of the base. The base plate can be built using LEGO build plates. ![]()
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