I saw plans a few months ago on the creek for a children’s marble toy. If I remember correctly it had a sheet of plywood with a thin metallic sheet covering it. PVC was used to cut the channels for the marbles to roll in and the PCV was mounted to a piece of wood with a magnetic strip on the back. You can position the PVC pieces on the covered plywood to create different ways for the marble to roll down to the bottom. I was thinking of making this for my grandson and I don’t remember where I saw it on the creek. If anyone remembers this can you point me in the correct direction
Thanks
Scott