Present for first child

I’m

39 weeks pregnant with a boy and I already have a 6year old son who is just the cutest little thing, he helps me with the food shopping getting stuff on the bottom shelf and every day at school drop off he hugs my bump and kisses it 😭.

I would like to get him a little gift for when the baby arrives I don’t want him to feel left out or forgotten 😞

But I’m stuck on what I can I get him, any ideas??