Parents tend to worry about the non-verbal section of the ERB / WPPSI test used in NYC private school kindergarten admission.
"No question Joe is verbal. But non-verbal? What is that ERB section anyway?"
The ERB / WPPSI IV non-verbal section tests children's short term memory, processing speed and accuracy, and reasoning skills. In April 2013, the ERB got rid of the old Coding section, and replaced it with the intriguingly named Bug Search.
Nowadays you can buy ERB test prep books specifically designed to crack the ERB non-verbal section:
However, some families prefer to go around the problem: that is, prep their preschoolers in the skills and capabilities the ERB / WPPSI IV non-verbal section tests rather than specifically working on the test questions themselves.
If you fall into this camp, here are some useful ERB prep non-verbal section books and toys.
ERB NON-VERBAL TEST PREP KIT