My DS was younger when he took his tests (4-5 yrs), and they were SB-V and WJ, rather than WISC/WJ. We told him he was going to take some tests to see how his brain worked so we could figure out the best type of schooling for him. We also told him that he needed to answer all the questions even if they seemed really easy, because that was the only way to get to the more interesting and fun questions. He thought the SB-V was really fun and wanted to do it again. The WJ he thought was fun, just not as much fun because part of it included writing, which he wasn't so keen on.
Here's a link to Aimee Yermish's useful advice on Hoagies:
http://www.hoagiesgifted.org/test_prep.htm
