As they looked, Meggy appeared back around the corner. She was in some kind of odd contraption. She was standing up, but she was also sitting down. She was in a saucer shaped vehicle with several wheels like would be on an office chair. Her bottom was suspended in a stretchy seat that wrapped around her crotch, allowing her bowed legs to dangle so her toes brushed across the floor, allowing her to propel herself about without actually walking.
The whole contraption was a giant sized baby walker. It was yellow plastic with a red seat. There was a tray before her with Sesame Street characters built into it, lighting up when she bopped them with her hands. So as she jolted the walker left and right with her uncoordinated leg thrusts she was also eagerly slapping at the figures on the tray, crowing her delight as they lit up.