My favorite interaction that I remember fondly of is Tamagotchi. Below is a picture of it.
I remember as a kid playing with it a lot. The reason why it felt so special was because it felt like I had a real pet. The interaction that you had with the device is somewhat similar to interacting with a puppy. Moreover, as you take care of the little tamagotchi character, it evolved or even grew up.
Most of the toys that I was introduced to as a kid did not have such factor to it. It was fun to play with it for a while, but there were limited things you could do with them. However, this little device had several different options. You could help it exercise, eat, clean, and even find a friend with someone else’s tamagotchi. This was definitely my favorite interactive experience.