Recognising the role of evolution and having a meaningful life are not mutually exclusive, and learning about the origins of our species should not strip modern people of our sense of meaning and significance, wherever we derive it from. At the very least, it should make us thankful that nature and evolution have instilled us with brains that let us even contemplate meaning at all.
If adults and children both draw the same thing, does this mean that we effectively see the world in the same way? This would dispute the work of famous Psychologists such as Piaget, who assume that children are not just 'miniature adults' and actually have different cognitive processes depending on their age.
If you spend any amount of time on public transport, particularly in our anti-social, paranoid, abrasive capital city, you'll notice that the vast majority of people neither talk nor look at each other and instead opt to waste away their existences in the soul-destroying cesspool of social media, angry birds, BBC iPlayer and other such pointlessly depressing activities found on smart phones.