Personalized 4 Year Old Police Car Birthday Toddler Full Zip Hooded Jacket. Cute 4 year old birthday Toddler Full Zip Hooded Jacket - Black with police car and I'm four quote for a little boy turning 4 years old. 7.5 oz., 60/40 cotton/polyester. Jersey-lined double-needle hemmed hood. Pouch pockets for all their treasures. Coverstitched shoulders and armholes. Coverstitched rib waistband and cuffs.