Of course, your products must also be good. It must look very nice and attractive. Another thing of course is that the toy must have a defining feature that’s unique or at least attractive to the kids. Boys, for example, love cars. You can start with this premise and think of something that will make the little boys want to buy what you are selling.
When kids start seeing them always and they get hooked to the toy, there will be no stopping them from asking their moms and dads for one. And more often than not, parents would oblige, if not right away, at least eventually.