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Collins Singer runs to pick up her stuffed animal after it spent the night at the Park City Library on Oct. 21, 2017. This is the third year in a row the library has allowed stuff animals to gather for a sleepover during UEA weekend. (Kira Hoffelmeyer/Park Record)

Ava Singer shows off how her stuffed animal got into the copy machine overnight at the Park City Library on Oct. 21, 2017. The library has allowed the stuffed animals to have a sleepover for the last three years on UEA weekend. (Kira Hoffelmeyer/Park Record)

Jonathan Becerra is reunited with his stuffed animal after it spent the night away from home at the Park City Library on Oct. 21, 2017. This is the third year that the library has allowed Parkite children's stuffed creatures to sleep over during UEA weekend. (Kira Hoffelmeyer/Park Record)

A group of children watch a slideshow of how much trouble their stuff animals got into after a sleepover on Oct. 21, 2017 at the Park City Library. This is the third year in a row the library has hosted the event, held on UEA weekends. (Kira Hoffelmeyer/Park Record)

A group of children watch a slideshow of how much trouble their stuff animals got into after a sleepover on Oct. 21, 2017 at the Park City Library. This is the third year in a row the library has hosted the event, held on UEA weekends. (Kira Hoffelmeyer/Park Record)

A group of children watch a slideshow of how much trouble their stuff animals got into after a sleepover on Oct. 21, 2017 at the Park City Library. This is the third year in a row the library has hosted the event, held on UEA weekends. (Kira Hoffelmeyer/Park Record)

A group of children are reunited with their stuffed animals fter a sleepover on Oct. 21, 2017 at the Park City Library. This is the third year in a row the library has hosted the event, held on UEA weekends. (Kira Hoffelmeyer/Park Record)

A group of children watch a slideshow of how much trouble their stuff animals got into after a sleepover on Oct. 21, 2017 at the Park City Library. This is the third year in a row the library has hosted the event, held on UEA weekends. (Kira Hoffelmeyer/Park Record)

A group of children watch a slideshow of how much trouble their stuff animals got into after a sleepover on Oct. 21, 2017 at the Park City Library. This is the third year in a row the library has hosted the event, held on UEA weekends. (Kira Hoffelmeyer/Park Record)

A group of children watch a slideshow of how much trouble their stuff animals got into after a sleepover on Oct. 21, 2017 at the Park City Library. This is the third year in a row the library has hosted the event, held on UEA weekends. (Kira Hoffelmeyer/Park Record)

Parents and children alike gathered at the Park City Library to watch a slideshow video of their "stuffies" up to mischief in the library on Oct. 21, 2017. This is the third year in a row the library has hsoted the event held on UEA weekends. (Kira Hoffelmeyer/Park Record)

Collins Singer, center, and her dad, Noah, watch as a slideshow plays pictures of all the mischief her stuffed animal got into while at a sleepover at the Park City Library on Oct. 21, 2017. (Kira Hoffelmeyer/Park Record)

Elizabeth and Jonathan Becerra sit and watch a slideshow at the Park City Library of stuffed animals having a sleepover. The stuffies got into lots of mischief overnight. This is the third year in a row the library has hsoted the event, held on UEA weekends. (Kira Hoffelmeyer/Park Record)

Nora Markkanen is reunited with her stuffed animal after it spent the night at the Park City Library. The stuffed animals got into lots of mischief overnight, but secret cameras caught their every move. (Kira Hoffelmeyer/Parl Record)

Nora Markenan, left, and her mom Katie Wright, right, watch a slideshow video showing all the mischief Park City stuffed animals got into as they were caught on secret cameras during their sleepover at the Park City Library. (Kira Hoffelmeyer/Park Record)