[No matter how long Newt is in Wonderland hearing people talking about Hogwarts will always make him smile.]

Exactly like that, and some of them have been utilized in lessons at Hogwarts. My mum raised them.

Perhaps not use a weasel, but whatever his favorite food is. Food is always a good lure for animals. I use it quite a bit to help me get closer and earn the trust of creatures when I'm studying them.