Can I upgrade the wheels on the DUO from the EVA wheels? Does the DUO come with a snack tray? Does the DUO come with seats? Does the DUO have a footwell? Does the DUO have all terrain wheels? How much does the DUO weigh? How much weight can the DUO carry? Is the DUO JPMA Certified? What age is the DUO recommended for? What are the differences between the Vyo͞o and the DUO? Why is the DUO considered a utlity wagon?