We added 3 glo pals for the occasional glow bath, and my kids (3 and 2) love them! Would definitely recommend!
I have spent a ridiculous amount of money on bath bombs that made my daughter love getting in the bath. These aren't quite as exciting as bath bombs but they still help add some fun to bath time and aren't nearly as costly over time. It would probably be more fun with multiple characters so we'll need to add to our collection.