Pop Mart Mega Collection 1000% Skull Panda Between Light and Dark WHAT'S A BLIND BOX 1. Blind Box refers to the type of packaging that keeps the collectible toy as a mystery until it is opened. Blind boxes typically come in series that show a collection; some figurines are rarer to find than others, these are referred to as "secret", "hidden" or "chase" figures. 2. If there is a secret figure in the box, one basic figure might be replaced randomly.