I’m worried because my kids tend to have unbalanced diets.
People who are biased about what they eat usually only eat sweet stuff like candy and ice cream. This picky eating gives them a really unbalanced diet. Candy and ice cream are okay, but you have to be open to eating other things too.
This is a jukugo word that uses the on'yomi readings of the kanji. You should be able to read this on your own.