My children love this kind of Lego toy because it is very flexible.
For example, a prince/princess is not a whole piece as they made arms, legs, dresses, hair (the parts) separately. And, you can "mix and match" these parts to create many different versions of a prince or a princess.
For example, if you don't want the prince's blue hair, you can use the red hair.
This makes children more creative.
I am not sure I can use the phrase "mix and match"?
For example, would it be correct to say "This Lego toy is interesting. You can mix and match different Lego blocks to create different stories"?