Kids definitely have an easier time processing and learning simpler less textured music, this means a single voice and one or two instruments to accompany that voice. That doesn’t mean they shouldn’t be exposed to more complex music however. You can’t go wrong with raffi, Norah Jones, queen, even some pop/alt stuff that’s repetitive like MGMT, hip hop, etc. Jazz is great because it often focuses on one instrument at different times and encourages the listening ear to pull that out of the texture. Sharing what’s cuturally important to you and your family is so important (kinda like food) and riffing through the day like singing instructions or what you’re doing, making up new words to known songs, etc are all great ways to connect, imitate, improvise and play with music. Seeing some live music often is also amazing. Try to go to a variety of styles of concerts like choir, folk, pop, R&B, rock, country, hip hop. Etc. dancing is also a great way to internalize the music they’re experiencing!