Caitlen doesn't that each times her dad hides he still exists.
Explanation:
Baby Caitlen is still one year old this means that she is still learning that things still remain when they disappear and come back in sight. The psychologist Jean Piaget called this principle "object permanence". As the baby grows older this effect seems to wean off. The baby is learning that things do not disappear but are merely out of sight.
