Aww, that's such a sweet idea! A few of us started doing this din, and honestly BDO and BPI have really good child savings accounts na walang maintaining balance or minimal lang, perfect for collecting gifts tapos makikita nyo talaga how it grows over the years. Metrobank and Unionbank have competitive rates din, so it's worth checking which one has branches nearest sa inyo para convenient ang deposits, I personally prefer whichever bank is closest kasi mas likely talaga na makaka-add kami regularly haha!