Here is a neat look at the changes that have taken place at Sesame Place over the years. Here are two shots, one take in the early 1980s and one take about 25 years later:
Image from YouTube
Image from Google Street Views
We can see that the landscaped area has been removed (along with the bench and trash can) and the buildings have changed color.
First Aid is still in the same location. It's attached to Cookie's Cafe (previously Sesame Cafe) which was The Computer Gallery in the 1980s.