A kiddy seat, like a maxi cosy.

As a new parent, I’d have loved cleaning services.

Baby clothing.

Offering to baby site I'd imagine.

A little baby-sized motorcycle. They'll appreciate you trying to make sure their kid doesn't start out a NERD.

Baby monitors. That's what I got a friend after they had their first child.

Im not sure what the customs and traditions are in your country but here we usually have baby showers. The parents usually register at a store or website like Amazon. There, they have a list of items that they would like or are in need of.

Earplugs?

Something they need.

Money, always money. Money is the only parent I need.