I was just playing with some of my pieces and noticed one thing I would have changed (that I also remember thinking as a child). I regret that the Pet Shop doors didn't open. I love that feature on the zoo and Baby Buddies Nursery. It really would have added a bit more to the fun when playing with the Pet Shops or Kennel Set. I wonder why Kenner didn't put a hinge on the doors.
What about you? What would you have changed or added to the line or a set?