One more idea of warm up

I like activities like that one -"Simply Clever"

I found it on English-to-go.com.

SHOES

Where were your shoes made?
How did you get them?
What colour/size/shape are they ?
Was there a special reason for getting them?
Where have you been in those shoes?
Ask your students to look at their shoes and think about their history for a minute in silence, then ask them to take a pen and paper and find a partner.

In pairs the students take it in turns to find out as much as possible about the other person's shoes (you may like to have a time limit of 3 minutes each).

While they listen to each other's answers they can take notes.

At the end of the activity each student takes turns to tell the class one interesting thing they found out about their partner's shoes. It really works!