Mount Sinabung is a big mountain in Indonesia that likes to spit out hot rocks and ash. This can happen when the mountain gets angry and decides to throw a temper tantrum, kind of like when you get really mad and shout or hit something. When Mount Sinabung is throwing a tantrum, it can be very dangerous for people living nearby because the hot rocks and ash can hurt them. That's why the government helps people leave their homes and stay safe until the mountain calms down again. So basically, Mount Sinabung is a big mountain that likes to throw hot rocks and ash when it gets upset, and people need to stay away from it to stay safe.