Do the road with magnetic paint and add magnets to the cars. Playroom or little boy's room. I think the better idea would be to place this on the floor rather than teaching kids to drive cars on the walls.
DIY IKEA Hacks for Kids' Rooms: GRUNDTAL magnetic knife rack repurposed as a wall storage for toy cars.Ikea magnetic knife rack for car storage. Yes! Keeps the favorites handy and off the floor (saving my bare feet in the dark).
Love the elegance of this baby room! It really reminds me of my wedding color palette, and it's very classy with the chandelier too [Pink grey baby room. It could translate to a big girl room, later down the road.