There are no specific laws against using or buying sex toys at basically any age, however there are laws about pornography.
Although the age of consent is 16 in Canada you have to be 18 to purchase or view pornography.
In the United States, a series of Supreme Court decisions in the 1960s (based on the First Amendment to the United States Constitution) generally legalized sex shops, while still allowing states and local jurisdictions to limit them through zoning.
Zoning regulations often caused shops to be located either on the outskirts of town, or clumped into a single area, creating a type of red light district of adult stores and businesses.
The licensing or closing of unlicensed sex shops, along with cultural changes such as the substantial relaxation of general censorship and the ready availability of non-commercial sex, have reduced the red-light district of Soho to just a small area.
The borough has fifteen licensed sex shops and several remaining unlicensed ones.
The first sex shop on the continent of North America was "The Garden".
which was opened in October 1971 by Ivor Sargent on tony Crescent Street in downtown Montreal, Quebec.
Sex shops in Scotland are regulated under the Civic Government (Scotland) Act 1982.
On the other hand, there are stores that evolved specifically out of a sex-positive culture, such as San Francisco's Good Vibrations and Xandria.
The latter class of stores tend to be very consciously community-oriented businesses, sponsoring lecture series and being actively involved in sex-related health issues, etc.
In some jurisdictions that permit it, they may also show pornographic movies in private video booths, or have private striptease or peep shows. There are also many online sex shops selling a variety of adult content such as sex toys, pornographic magazines, pornographic films and fetish wear etc.
These types of shop are often favoured by the consumer as they have less overheads and can be perused within the comfort of the home. Almost all licensed adult stores in the UK are forbidden from having their wares in open shop windows under the Indecent Displays Act 1981, which means often the shop fronts are boarded up or covered in posters.