As a nightclub owner, it is your responsibility to make sure that your patrons don't get caught in a hellish blaze should something go terribly wrong. Part of that involves having clearly marked exits that are designed to accommodate emergency egress. However, it's also important that you bring in a fire protection engineer from a company like Zari Consulting Group and have them make sure the club itself is as fireproof as possible.
If you make a sign that advertises a small toy, you are going to want to make sure that the sign is designed to appeal to the children, not the adults. If you make a sign that is aimed at the adults, both the children and adults are going to ignore it and you lose out on business. If you make a sign that appeals to children, you increase the chances that they will plead with their parents to be allowed to take the toy home and therefore increase the number of potential customers you have.