When organizing introductory to electronics events, it many unexpected things could go wrong.
Laptop should not be from library/school, as it doesn’t allow to install required drivers.
Remind them to bring mouse and charger.
New macbooks only have USB-C/thunderbolt ports, and may need different cable to connect Arduino/NodeMCU/etc.
Kids should be able to read English words (function names, identifiers, etc), able to use computer, and know keyboard layout. Using en-us layout on Finnish laptops is frustrating, when they need to use brackets, semicolons or arrows.
Some may bring old laptops that only support WiFi a/g. Setting up alternative WiFi AP could be good solution.
Have enough extension cords.
Somebody may accidentally short-circuit battery pack, and it will explode or hurt others. Always check that First-Aid kit is available and complete.
Be ready that 10-20% of things/components get broken. Preparing spare parts will reduce stress for organizers.
Kids should be able to read English words (function names, identifiers, etc), able to use computer, and know keyboard layout. Using en-us layout on Finnish laptops is frustrating, when they need to use brackets, semicolons or arrows.
Understanding electronics and safety is not part of their attention. Try to avoid having laptops and other devices that directly connect to power line. Using powerbanks could be a good idea.
Tasks with modifying single integer variable, and then trying is easy and keep interest. It could be motor speed, delay or number of cycles in for-loop.
Kids may tear wires, bend pins, and experiment with electronics in other not-expected ways without even noticing what they are doing. Allow them to do it.
Battery, motor, potentiometer, few leds to destroy, resistors, breadboard, wires is enough to keep them busy for few hours.