Henry and Mudge and the Snowman Plan (Henry and Mudge Series #19)

One snowy day, Henry and Henry's big dog Mudge see a sign.
It says SNOWMAN CONTEST.
"Wow!" says Henry, and Mudge wags his tail. Then they run home to tell Henry's father.
Can Henry, his father, and his big dog Mudge come up with the best snowman plan and win the contest?