I scheduled the tumblebus for my four year old’s birthday party. The bus showed up on time. It is so much fun watching a circus-like bus show up at your house. My house is on an incline, but that was not an issue. There is a zip line on the bus and Kristin, the owner and operator of the bus would push the kids on the zipline and made it look effortless on the incline. The bus allows for 16 kids at one time. There is a zipline, a small ball pit, a climbing wall, and monkey bars. Kristin also plays music while the kids are playing. This is a perfect activity to schedule for a child’s birthday party. I think the best age range is from 3 to 5 years of age. The 2 year olds were a little too small and shy of the activities and the 6 year olds seemed a little bored. I would suggest the tumblebus to anyone looking for an idea for a birthday party. Kristin is so nice and full of energy, perfect for working with kids. The kids seemed to love her. Every kid got a stamp at the end of the bus time and it made them feel so special.