Metal Man and his Mirrors by L E Cooper

Jono swaps his wheelchair for his grandpa’s ride-on mower, drives it into the forest park — and ends up in a completely different world, along with his sister Emily, and Ian, the boy from next door.
It’s a world of singing trees – but also some tricky characters, and the newcomers have to get them-selves back home...
Metal Man and his Mirrors reflects a love for the New Zealand bush and forest, for music, and above all, a respect for all young people who must “stick to the task” of finding their way through today’s tricky world.