Ehat should I wear for work experience.

I am 17 years old and I'm doing work experience in a primary school very soon. All I have been told it to wear something comfy, but to avoid big logos, but I'm not too sure what comfy could be considered as. Are leggings okay? Are hoodies okay? Are trainers okay?

Please give ne advice about what I should wear. I am going on the last week before christmas, and I'm in the UK if that matters.