Is this mold?

Hello, I just moved into a furnished rental apartment. The apartment has a slight odor; if I stayed there for an extended period, I would describe it as pungent. I discovered this behind the cupboard (see photos). Is this mold or mildew? How serious is the situation, or should I leave the apartment immediately because…

How do you attach a Hobby Horse stick to the head without it wobbling?

Hello everyone If you're not a hobby horse fan, you shouldn't read this. 🙂 I'm currently working on a new hobby horse. That means I'm sewing one myself. I've already sewn three myself, but the head always wobbles. I'd like to sew one this time where the head doesn't wobble. Do you have any ideas…