Where's Santa? Out of This World

Where's Santa? Out of This World by Louis Shea
 
Oh no! All the reindeer are sick, so Santa can't deliver his presents! Luckily, his elf Digit has invented a Robodeer to fly the sleigh, but a programming accident sends Santa zooming toward another galaxy. To get home in time for Christmas, Santa must navigate through strange planets like Pudding Planet and Snowglobe Planet.
 
This out-of-this-world search-and-find adventure features over 700 things to spot, including elves, aliens, and unicorns.