How do I say this?

Took the youngest two out to lunch yesterday and today, and the boy napped better than he has for a long time.

Because of the HG, I can't walk much when I'm pregnant.  But I think the outing may be enough to get Doug to nap properly.

So I want to say "I'll start taking them on walks when..."

When what?

First impulse: "Once the baby's here, I'll start taking them on walks daily."  But the baby's not going to be here.

So do I say "Once I'm not pregnant anymore..."?  That just sounds cold.  And wrong, even though it's factual.

In the end, I said nothing at all.