Think that your innocent-looking toddler brother or sister are all sunshine and smiles and no darkness inside? Better think again. Dr. Vasudevi Reddy from the University of Portsmouth's psychology department, studied more than 50 children and interviewed their parents - and was surprised with what she discovered.

In the past, it was established that children's brains are not capable of lying until they reach the age of four. However, Dr. Reddy's research showed that even infants seem to know how to get their parents' attention with fake crying and fake crying. Dr. Reddy said:

Fake crying is one of the earliest forms of deception to emerge, and infants use it to get attention even though nothing is wrong. You can tell, as they will then pause while they wait to hear if their mother is responding, before crying again.