Attaching miniatures to your promotional keyrings is a great way to turn your cheap promotional object into something that is more akin to a collectible; thus helping to not only promote your product but to make sure that your promotional keyring remains in your client's hands for a long time. Literally anything can be made into a miniature model so this method will work for everyone and every company. Although everything can be represented in a miniature promotional keyring, it is probably a good idea to choose objects that represent your company in terms of the products or services that it provides.

After choosing what item you want to many tries for your promotional keyring you will then want to pick an appropriate material to construct the miniature out of. Anything from metal, to plastic; or even glass and Crystal would work well. Basically your material choice all boils down to two factors; how much you want your miniature promotional keyrings to cost, and what sort of aesthetic are you aiming to achieve.

If you wish to work with metal for your promotional keyrings then you will need to be prepared to pay a little bit more for the cost of the material as well as the higher labor costs when working with metal. Metal is also only suitable for miniature promotional keyrings when you want the keyring to actually look metal, that is to say if you want a colorful effect do not bother painting the metal instead go with something like plastic which will save you some money. However if you do want a metal promotional keyring and then you'll need to take into consideration how you want is metal to be manufactured.

Your two basic options are either metal stamping, or metal casting. Stamped metal is only suitable for creating flat shapes that have some sort of relief on their surface. This can make a very attractive miniature promotional keyrings, however it is not as suitable as cast metal. Because you are only working with one plane when dealing with stamped metal a cast metal promotional keyring will look much more detailed because you can get a full three-dimensional miniature figuring. That being said, a cast metal miniature promotional keyring will cost much more than a stamped metal promotional keyring, so choose wisely.
If cost is your main concern then a plastic miniature promotional keyring is a much better alternative to metal. Plastic can be very colorful, cheaply molded, and quite durable. A plastic miniature promotional queuing can also be manufactured very quickly and in reasonable run sizes. The only real downside to a plastic miniature promotional queuing is that it is not as expensive looking as metal so it is unlikely to have the same longevity in your customers possession. That said, plastic really is a more suitable material for constructing a promotional keyring than metal because at the end of the day you do not want to invest that much capital in promotional keyrings.