Aristotle Circle publishes a comprehensive workbook to prepare children for kindergarten testing. Their workbook offers 450 practice questions, covering all sections of the ERB or WPPSI-III test.

Aristotle Circle's workbook is the Rolls Royce of kindergarten test prep products. Here is what I love about it:

• It is extremely comprehensive. Each section offers plenty of practice questions that range from easy to hard (just like the test itself).

• It is well organized and easy to follow with tabs that differentiate each section. This helps you navigate the book and is something no other test prep workbook offers.

• The author includes some good background information about the test itself and how to make sure your child does his best. She also provides ideas on ways to build underlying skills at home.

• The artwork is bright, colorful and well-done. There are plenty of pictures so your child won't tire of seeing the same artwork over and over in different questions.

• The questions accurately reflect the types of questions that are on the actual test so practicing with them should be an effective way to prepare your child.

• The book is expensive - $500 - but they do allow you to buy individual sections for less. If you can figure out where your child is weakest and buy only those sections of the workbook, you can save. For those of you who live in NYC, the company will assess your child's strengths and weaknesses for $375. Instead of doing that, you may as well buy the whole book and see for yourself what your child does well and where she struggles.

• I practiced questions from this workbook with two 5-year-old volunteers. They liked the pictures and were easily engaged in doing the questions for close to 15 minutes.

Here is what I don't particularly like about the product:

• The price - $500 plus shipping. If you can afford this, great. If not, think about creating a Sisterhood of the Traveling ERB Prep Book.

• The blocks that come with the book are poorly made, not uniform in color and look too much like the blocks on the real test. Personally, I don't recommend letting your child practice with materials so close to the real thing. Some might say that crosses the line and is cheating. Plus, your child is very likely to tell the tester, "I have blocks like these at home only mine are blue and white." This will end up on her report and disqualify her from some schools. Use parquetry blocks to teach the underlying skill of copying patterns and then trust that your child will be able to handle test blocks when presented with them.

Bottom Line: This is an accurate, well organized, beautifully designed, pricey and comprehensive workbook. If you buy it, don't overdo it. 15 minutes a day is all you need. You don't want your child to be sick of these types of questions by the time he's tested. If you are choosing between this and Bright Kids NYC's ERB workbook, choose this one if money is no object. The pictures are more attractive, the book is more comprehensive, and this one is a bit easier to navigate. If money is an object, go with Bright Kids NYC's workbook. You'll save $200 and that workbook will do the job it is designed to do, which is to familiarize your child with questions that are similar to those found on the WPPSI-III/ERB.

Purchase Aristotle Circle's Workbook at www.aristotlecircle.com.

To see reviews of other kindergarten test prep materials you can use to get children ready for private school admissions testing, gifted and talented program qualification, and public school ability group placement, visit www.kindergartentestingwithouttears.com.