Amazon.com : Akiles ACM-EX24 Model CombMac-EX24 All-In-One Electric Comb Binding Machine, Up to 25 Sheets 20lbs Paper (Letter Size), 1/4" to 2" Binding Capacity, Rectangular (5/16" x 1/8") Hole Size : Office
How to make a comb kazoo: Music activities for children - BBC Teach