As you sit there, starting off this activity, you are at a relatively early stage in the human life cycle.
Our life cycle moves through several different stages, which occur over a range of different times, across the whole of our lives.
For example, look at this graphic:
Can you see the different stages marked out with different months and years? For example, we are babies from birth to about a year old, then children from about 3 until 18. Even the time that we're children is divided into different stages: small child, older child and adolescent.
Prior to birth, in the mother's womb, we grow into a foetus and steadily into a baby ready to be born.
The newborn baby is fed on milk and grows into a toddler and then a child. Children grow on through adolescence, during which time their bodies experience a lot of physical and emotional changes called puberty, until they are about 18, at which point they enter adulthood.
Much of our lives is spent as an adult, first as a young adult (when we really start to explore who we are and what we like doing) and then as more mature, or middle-aged, adults.
Finally, from the age of about 70, we are seen as entering old age. Older people will have started noticing that their bodies won't do what they used to do, any more: things like easy movement, good eye sight, healthy teeth, skin and hair - all these things start to deteriorate as the body ages.
So, let's use this activity to help us to broaden our understanding of what happens to us as we move through the human life cycle, from birth to old age.
Remember, you can come back and look at this page at any point during the activity: just click the pink button on the right!