Stopwatch by Sally Morgan Ambelin, Blaze & Ezekiel Kwaymullina

A stopwatch has sixty thin black lines, each one marking off the seconds in a minute. However Tom's stopwatch is special and each line is a gateway to a different world. There are therefore sixty worlds in all which he can explore. In this book Bilby misses his friend Mother Bird, so the stopwatch takes Tom and Bilby to the Land of Leevan to cheer him up. Soon, the two discover a kind family of Beeres and Tom joins them on their quest to find an adventure. But when they stumble onto another human visitor, the joyful land is in danger. Could it be the evil Illian and can Tom save Leevan in time?