Instructions
Turn on your Sims 2 game and enter the house with the baby you want to see the Needs for.
Open the cheat window by pressing "CTRL," "Shift" and "C" keys simultaneously.
Type "boolprop testingcheatsenabled true" into the cheat window and hit "Enter."
Hold down the "Shift" key and click on the newborn. Click on "Make Selectable/Unselectable" from the menu that pops up. The picture of the baby will disappear from the panel on the left side of the screen.
Click the "Shift" key and click on the baby again. Click "Make Selectable/Unselectable" again. The picture of the infant will return in the panel and when you select the baby from the panel you'll now be able to see her needs and how happy/unhappy she is.