LEGO polybag collectors have many reasons to enjoy their hobby. Polybags are LEGO sets packaged in small plastic bags rather than in boxes. This makes them easy to store. In addition, they are often more affordable than boxed LEGO sets. Many LEGO polybags come from McDonald's promotions or promotions by other companies. There are also seasonal LEGO polybags, including various Santa models, Easter rabbit models, and Valentine's Day sets. Choosing a theme and then trying to find all the polybags for that theme is a great way to get started collecting polybags. These sets also make excellent gifts for young children, since they contain relatively few pieces. Collectors often buy two of each set, so that they can keep one sealed and in good condition and build the model with the other. Polybag sets are also small enough that one can put together a model based on an instruction booklet, by hunting down individual pieces contained in various bags. Both sets and pieces are conveniently available through reliable sellers on eBay.