What does Jacob notice about Emma’s apple?

Before their first kiss, Emma picks an apple and gives it to Jacob while still inside the loop. The next morning, back in his own time, Jacob notices that the apple has completely aged and shriveled up. This apple is a symbol for the peculiar children themselves, as it is subject to the same forces that would rapidly age a peculiar child from the loop who spent too much time in the present. It is a reminder of the fragility of time and the consequences that result from shifting and bending it.