Thomas the Engine & Friends

Get a small box big enough to fit around your child's waist. Paint box blue (for Thomas), or green (for Percy) etc. With colored construction paper add stripes and train number to sides, also add black train wheels. On front make a 3D face with construction paper to match your train of choice. Attach a belt from a robe to each side and harness over shoulders.
Dress child up with a conductors hat.