Sonic Mechanical Pencils and Erasers Party Favors Bulk, 20 Pencils and 8 Erasers for Goodie Bags, Loot Bags, Plus More | Sonic Party Supplies Kids, Boys, Girls. This Sonic the Hedgehog stationery birthday party pack includes 20 pencils and 8 erasers, each featuring Sonic themed artwork. An addition for your next Sonic the Hedgehog themed party, these pencils and erasers can be handed 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, and so much more. Officially licensed Sonic the Hedgehog pencils are for kids, boys and girls alike. Set also includes Sonic stickers and a Rex-Man door hanger.