4 ms·This is so cool! I want to build one of these with my kids someday.by season2episode3 2y agoThis is so cool! I want to build one of these with my kids someday.iefbr14 2y agoHow do you explain a pulsar to a kid?IX-103 2y agoNatural lighthouse, right? It's got a bright side and a dark side and spins around.antonvs 2y agoIt’s more like it has a laser pointer stuck through its magnetic pole. You could do a little demo with say a potato and a laser pointer.