The Kids Harmonicas are made of non-toxic plastic, they are safety for children. This diatonic harmonica with 10 holes offers versatility for a variety of musical genres; perfect for kids and beginners for ages 3 years and above. An excellent Christmas or birthday gift for children. Promote and develop your kid's musical abilities from an early age and as they continue to grow. Harmonica set comes with a transparent case for safe keeping and storage when not in use, keeping it clean and preventing your instrument from getting dusty. Size : 4 1/8"L x 13/16"W x 1 3/16"H.