We’ve talked about this tip before, but it’s one that is so useful in photography that it’s worth talking about again – using perspective to indicate relative size.
The best example of perspective improving photography is the moon. Everyone likes to take photos of the moon, but when they do it’s just up there in the sky – a white round thing. The more interesting images happen when you use perspective to indicate the size of the moon, by including the horizon, buildings, etc. All of a sudden the moon looks huge. The size hasn’t changed, just your perspective has.
You can try this with portrait photos of your kids – put them next to something big or small to indicate size. You can also play with perspective by making big things look small, or vice-versa. Have fun with it!