Check out this article in Newsweek about a simple test that the Swedes are using to identify gifted children. Although the test is a little controversial, it is phenomenally accurate at predicting full-scale intelligence scores. On 5- and 6-year-old kids, this simple test is virtually synonymous with a 90-minute intelligence test of their full cognitive capacities. The two tests discussed in the article have a 99 percent correlation.
I tried it with my two year old today and she did fairly well on the line test. Now I am curious as to her true talents. Try the test out on your kids and let me know how they work.