Altium CircuitMaker was used to design the schematic & PCB. The files are open source and available here. The design uses four flashing 3mm orange LEDs on the points of the compass and a single 0603 SMT blue LED in the center. They’re all powered by a single 3V CR1225 coin cell battery.
“Never pass up a teachable moment.” As a Boy Scout leader of many years, this has become one of my many mottos. Any time you have the opportunity to grab a child’s attention and focus that attention on something more educational than the latest video game then grab it and have fun. My son’s 6th birthday party recently became one of those moments.