The Lawnmonsters - Shannon Cooley - Bog

Bryce has one summer to prove he's responsible.

Then he accidentally brings the lawnmower to life.
He tries to hide his mistake by starting a mowing business, but the hungry lawnmower hasn't learned "stay" yet, his employees are demanding benefits, and if Dad finds out he's been lying all summer, he might never trust Bryce again.
Bryce's new goal: get through the summer with his relationships - and his mom's rhododendron bushes - intact... and maybe prove he's not just a little kid anymore while he's at it.