Shaving cream "car-wash". This keeps my guys busy for AGES. Super-fun. Great sensory activity as it feels and smells so lovely, and I love that it's "messy" play that washes up so easily! - Happy Hooligans
Simply mix one-half cup baking soda, one tablespoon dish soap, and two cups warm water in a small bowl. Use a soft sponge or towel to wash and gently scrub the tires and hubcaps. Spray with water and your car is ready for road tripping.