We got the checkered vinyl from Hobby . You can use plywood. We got 6 feet plywood from HomeDepot.
The carpet foam was also bought from Home Depot.
Good luck in making
Wow. Where did you get the checkered vinyl? Looks great. I need to get ours made if I am going to do it. Seems like I still have a lot of time, but I know it will go by fast. What is a good lightweight wood to use?
I remember a story in Doman's book about a woman who brought her track to the hospital, so I guess you can put the baby on it right away.