[IzzyMurad]

> being constantly alert

A good or a retarded dad? I am not sure. What trouble a 0-4 month old baby could get into if you put him in a place where he could not fall?

[jpatokal]

to run toward me screaming with excitement after I'd been away for awhile

Hint: That's not a 0-4 month-old child... and that's because dad took his four months off after mom had returned to work.

[Domenic_S]

I was confused myself, to be honest. Eventually worked it out that this was later in the kid's life (who goes to a playground with a 0-4 mo old?), but it was a little confusing.