There are a few different LEGO sets featuring Olaf from Disney’s Frozen. Here are some of the most popular ones:

• LEGO Disney Princess Olaf 41169: This set features a buildable Olaf figure with articulated arms and neck, allowing you to pose him in different ways. It also includes accessories like a blue bow tie and a pencil. This set is a great gift for Frozen fans of all ages and is currently available for purchase at LEGO.com and other retailers.
• LEGO Disney Princess Anna and Olaf’s Castle Fun 43204: This set features a castle with two levels, a spinning ballroom floor, and includes mini-doll figures of Anna and Olaf. It’s a fun set for younger children and helps to develop their building skills. This set is also currently available for purchase at LEGO.com and other retailers.
• LEGO BrickHeadz Anna & Olaf 41618: This set features LEGO BrickHeadz versions of Anna and Olaf, which are fun to build and display. This set is a great gift for collectors and fans of the BrickHeadz series. This set is currently retired, but you may be able to find it on resale sites like eBay or BrickLink.

In addition to these sets, there are also a few other LEGO sets that include Olaf, such as the LEGO Disney Frozen II Enchanted Treehouse 41164. This set is also retired, but you may be able to find it on resale sites.