The age is less important than the reason. The IQ test should be taken with a specific purpose, like admissions for private schools or as part of a psycho-educational evaluation.
IQ tests are normed by age, so if your child is 4 years, 0 months, the scores will be compared to other children of that same age. If your child has the emotional and mental maturity to participate in tabletop activities with an adult for an hour, he/she will be just fine. We do everything we can to ensure they are comfortable and have breaks as needed. Time usually goes by quickly. We want your student to show us his/her best so we help them feel most comfortable, no matter the age. If your student just turned 4 and you are concerned about maturity or attention span, we can schedule for later in the admissions season. Spots fill quickly, so get your appointment on the calendar, regardless of the month.