Osterfeuer is a special tradition that happens in some countries during Easter time. Think of it like a really big and special bonfire! People collect all kinds of wood, sticks, and other flammable things and pile them up in a big heap. Then everyone waits until it gets dark outside, and the fire is lit! People gather around the fire and watch it burn while singing songs and having fun.
It's a special way to celebrate Easter by getting together with friends and family, enjoying the outdoors and the warmth of the fire. Some people believe that Osterfeuer dates back to ancient times when people would light fires to celebrate the arrival of spring and the end of winter.
So that's Osterfeuer - a big and fun bonfire that people light to celebrate Easter!