"Up From Unda": Up & The Very Brainy Day

Up - the little flightless weka - likes to visit his human friends on the remote southern isle of Rakiura. However they can’t figure out each other’s language, so there is always an adventure to had in the misunderstanding. For children 8 to 10.
In Book 4 of the series, Up has a most discombobulating interaction with music. Is it an issue of mind over matter? In the end there is sweet harmony.
Book 1: Up makes his very first human acquaintance - the Rev Dyson.
Book 2: Up gets caught up in some very magical dangers.
Book 3: Up restores the sparkle to Xmas at the Christian Allsorts Church.
Book 5: Up tries to look after the sick and becomes an accidental fashion stylist.