English Translation
What a cute baby! Peek-a-boo!
What a cold flat version of peek-a-boo in Japanese!
We usually spell いないいないばぁ or いないいないばあっ. Check out the natural speaking of いないいないばあ on this YouTube clip. The Clozemaster TTS doesn’t put the intonation on the first letter of ばぁ. I also find the unnatural intonation on て of なんて. You should put it on な of なんて.