Jonathan B - no need to take any snacks. They provide lunch and also give you a starbucks voucher for the mid-day coffee break.
Air22 - there is no way you can revise/practice for these tests. The only thing you can do is to look at cubes for spatial awareness...as there are a few in there. Everything else cannot be prepared for! During the tests you will be given very clear instructions....so simply relax and have a good nights sleep beforehand.
Good luck to you both!
