Make-believe n. : A feigning to believe, as in the play of children; a mere pretense; a fiction; an invention.

Make-believe a. : Feigned; insincere.

Example:
Are all make believe or imaginary worlds in some sense idealized?

Taxonomy
Costumes, puppets, Educational Toys, imagination, Princess, Birthday Supplies, Princess Dresses, Make Believe, styles, birthday, Princess Party, Fairies, childhood, dress up costumes, dress, Child Costumes, party costumes, ball.

Defination from the web:
Make Believe superstore. Everything for a growing imagination. ... he magic of childhood is alive at Make Believe. Children love to day dream and image they can be anyone. ... Do you have a child, neice, nephew or granchild having a birthday. ...