An experimental group is the group in an experiment that receives the variable being tested. One variable is tested at a time. The experimental group is compared to a control group, which does not receive the test variable. In this way, experimental groups are used to find answers in an experiment.
1 At around 9 months of age, babies begin to pull themselves up to a standing position. 2  By 10 months of age, a baby should be able to grasp objects with thumb and forefinger.
I don't have kids, but I had a Child Care class when I was in high school, and I learned that children start to be able to identify colors around age 4.Some 3 year old may be able to start if they are above average intelligence.Barney Blake Â· 8 years ago.eport Abuse. I don't have kids, but I had a Child Care class when I was in high school, and I learned that children start to be able to identify colors around age 4. Some 3 year old may be able to start if they are above average intelligence. Barney Blake Â· 8 years ago.