For example, there are “Time Turners,” from the “Prisoner of Azkaban” book and movie, and there are also faithful reproductions of Harry's wand, as well as numerous other objects such as the Marauder's Map that a fan can choose from. There's even Godric Gryffindor's sword, from “The Chamber of Secrets.” Most such gifts are actually relatively affordable, as well.
For those who are into J.R.R. Tolkien and his “Lord of the Rings” trilogy, a complete line of gifts and and merchandise can be found everywhere. Both Aragorn and Gandalf's swords are available, and some can be bought for low prices, while the really nice models can cost several hundred dollars. A full range of items such as the magical Palantir “seeing eye” stones and Gandalf's staff can also be bought.
Other items related to magic itself can be found in shops, stores and online, including more than a few magic tricks that can be purchased separately or in kits both large and small. Books on how to do magic, starting from simple parlor tricks, card tricks and other easy-to-learn items, are probably the best way to start.
When it's time to get serious about magic and how to perform it, there's even a “Magic for Dummies” book that can teach really good magic from its very beginning to the performance of an easy set of very popular tricks. In fact, some of these techniques and “tricks,” so to speak, have never been revealed before. But for those who just want to read a good fiction story or play a board or online game related to magic, there are hundreds of titles and games to choose from nowadays, happily.
Lastly, many people who love the world of wizardry and wizarding like t-shirts, clothing or even costumes. Several good online retail stores offering just such items now exist, and they sell many quality pieces of merchandise at fairly nice prices, which is worth noting.