What should my boss get his wife for Mother's Day?

Usually this wouldn’t concern me, but the CFO of my company just came out and offered a half-day tomorrow to whoever can come up with the best gift for his wife for Mothers’ Day on Sunday.

A few details:

He and his wife are mid-thirties.
They have a four year old son, bonus if the gift involves him somehow.
He said she was a practical person, so no jewelry or anything like that.
I am trying to think outside the box here. Cliches like flowers, massages/days at the spa, chocolates, and breakfast and bed are overdone. I need to win him over with something unique.

Any help would be appreciated. If you can get me a half day off tomorrow, I will forever be your faithful fluther follower!