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.
When can my child start bathing himself? Q: When can my child start bathing himself? A: Between 15 and 18 months, a toddler usually has enough coordination to lather up certain body parts, but you should still lend a hand to make sure he gets clean and doesn't decide to taste-test the soap. Arm your child with a small washcloth or mitt, soap, and a plastic cup for rinsing and let him go to work.