Gift/special day ideas for older sibling

My son is 3 and we will be welcoming his baby sister in March. I want to do something special for him and was thinking mommy and me day right before she is born (scheduled c-section), but considering my fatigue and breathlessness at 30 was don’t know if a solo mommy and me day is in the cards. Now I’m thinking maybe an ice cream date lol also we gave him some gifts from baby sis on Christmas, but also want to give him something when we bring her home. Was gonna do a camera bc he loves to take pics but he got one from grandma for Christmas and also already has 3 I’m a big brother type books. Would appreciate any gift or ideas for a special day before new baby arrives :)