Far more fun and meaningful to make artistic photos your kids, rather than factual ones.

First of all, I say focus on composition. Strive to make dynamic compositions, skills in street photography will help.

Find interesting backgrounds

Also, shoot your photos as dark as possible, and photograph your kids against interesting backgrounds. For example, I like high contrast graffiti backgrounds.

Subtle details

I also say, I love the subtle details. For example, the silhouette of your kids hand against the background.