ShindigZ NASCAR Stock Car Pinata with Pull String Kit by Shindigz. $12.99. Stock Car Pinata Squeal your tires for this revved-up race car pinata! Each Stock Car Pinata measures 12 inches x 18 inches and is made of paper mache. Filler sold separately. Pull-String Kit is included. Pinata Filler Our 2 lb. bag of Pinata Filler contains 1.4 lb. of candy and .6 lb. of toys and trinkets.