Your progress is saved only in this browser, in a cookie of our own. It is never sent anywhere.
The green button turns your model into a device with weight and gravity. Physics doesn't decorate: it judges what you built. And testing is free, because the red button puts everything back exactly the way it was.
🎯 The challenge of this lesson
Build a tower of three boards without soldering, start it up and see what happens; then solder them and start it up again.
Write your question and another student — or the teacher — will answer. Your email is never published: it is only used to let you know when someone replies.