If you use igoogle as your homepage, you probably saw this on WikiHow.
Here is an excerpt...
The original "marshmallow test" was conducted by Stanford psychology professor Walter Michel 40 years ago. The test was meant to measure which children could delay gratification. Follow up studies showed that children who could postpone eating a marshmallow at age 4 outpaced their peers in many areas when they were 18 years old: They scored 210 points higher in the SAT and had higher confidence concentration and reliability. This simple test proved to be twice as predictive of later SAT scores as IQ tests.
The marshmallow test described here will hardly qualify as a valid scientific experiment. Passing the test won't indicate your kid is on the fast track to Harvard. That said, it is a fun activity to do with your kids, and an opportunity to impart a valuable lesson in patience.
We did this today. Here's how it went down.
NOTE: We took this right after lunch - I had just put his shirt in the wash bc he spilled juice all over it.