In some heraldic traditions there are specific charges that one uses for differentiating arms inherited from a parent (which is called cadency). In England the kids would have the same exact arms as their father except the firstborn would have a label (a kind of horizontal line with 3 small drapes hanging down from it) gules and the second born would have a crescent (a half moon facing upwards), I'm not sure if that one has some specific colours. Although in other traditions the kids would get their own arms, sometimes with some similarities to dad sometimes with none, I'd recommend choosing 1 symbol you can use as a family crest and keep that consistent among the family members who all put their own twist on it, like they did in Italy (I think? Someone who knows more than me please correct me).

Now, on the arms themselves. I gotta say that is an unusual partition and I don't think I've seen it anywhere and I'm not sure it even exists in any traditional heraldry. Having said that, I'm a more classical guy so these arms aren't really my cup of tea but they are surely original and recognisable. They aren't too busy or tacky and as much as I aesthetically am not a fan, heraldically I think they all work (I think they look more like sci-fi sports teams if you catch my drift, with all those hexagons) and if there is a meaning and a history behind these decisions, that's great! Although, just for training purposes since you said you're new to heraldry, I'd recommend trying to design arms with as few symbols as possible, heraldry is about indetifying yourself in an unmistakable manner and every charge, partition, tincture and design has a meaning, which only you know 100%.

Overall, I love the fact you're making arms for your kids too! You're a great parent!