Here is a new one! Lets say you have a pie and you take half a bite of the pie. You are only left half a pie now eat another half of that and another half and another and another... That pie will last for ever! But is is like a cell after a while. (Very good if you are hungry in the middle of class take half a bite of a tiny strawberry! )
(Hopefully it was okay for this too be revived, because I have a good one)
If completely compressed, the entire human race could fit inside a sugar cube—atoms are that empty.