Sonic Mechanical Pencils and Erasers Party Favors Bulk, 20 Pencils and 8 Erasers for Goodie Bags, Loot Bags, Classroom Prizes Plus More | Sonic Party Supplies Kids, Boys, Girls. This Sonic the Hedgehog stationery birthday party pack includes 20 pencils and 8 erasers, each featuring cute Sonic themed artwork. Perfect for your next Sonic the Hedgehog themed party, these pencils and erasers are great to hand out as party favors to boys and girls alike. Use these Sonic pencils and erasers in the classroom, as party favors, party supplies, goodie bag fillers, reward prizes, and so much more. Officially licensed Sonic the Hedgehog pencils are perfect for all kids, boys and girls alike. Set also includes Sonic stickers and a Rex-Man door hanger.