Zummi Buzz 4-in-1 Trike Introducing the Buzz 4-in-1 Trike has a 4-in-1 modular design to grow with your child from 10 months to 6 years. The Buzz Tricycle helps your child develop their motor skills and also coordination and offers a great alternative to a pushchair. The Buzz trike can be used with or without the canopy. In the parent mode using the adjustable and also detachable push bar. If your child is tired and no longer wants to pedal. This push bar can be used for pushing the Buzz.