Ay, sleep issues sa gabing-gabi talaga ang pinakastressful! From what I've heard, maraming moms swear by magnesium para sa better sleep sa 3-year-olds, it's supposed to calm their system down naturally. Some parents din nag-combine ng magnesium with l-theanine at tryptophan, at parang nakita nila ang difference talaga, lalo na kung may twitchy or restless vibes ang bata. The usual multivitamins with B vitamins (B1, B6, B12, folate) ay okay din overall para sa development, pero if tulog lang talaga ang concern, doon mag-focus sa magnesium-based options. May gummies at liquid versions available sa pharmacies dito, so mas madali gawin palatable para sa little ones. Just run it by your pedia though para sure sa dosage at if there's any underlying reason for the sleep struggles, sometimes it's more than just vitamin deficiency!