when i worked for Toys R us many moons ago back in 2001/2002 as a temp job the interview consisted of filling some forms for the first 30 minutes or so.
Then asked about your interests and where you think you would be best positioned in the store ie babies r us, teentronics, bikes r us, epos operator, shelf stacker etc.
They will probably ask you how you would deal with a couple of hypothetical situations ie difficult customer, returns, etc
They give you some info on the company and what is expected of you and then finally get you to make a couple of calls on the in store tannoy system so that you feel comfortable using it and also give you some of the special phrases they use for certain things ie Fire, somebody stealing items etc.
If your at interview stage then generally speaking you are pretty much in for a job considering the vast number of people they usually get applying for temp jobs at christmas.
Oh they will probably tell you a few other things that are expected of you such as the one night of stock taking they do for the entire building just after christmas.
But as others have said as long as you are polite and confident in your answers then you should be fine.
Good Luck.
PS. Unless times have changed Staff don't get any sort of discount
