• toy harmonica: 4 hole - 8 tone for simple kid song
  • super cheap
• 24 hole Asia harmonica - 24 tones in a row, each hole got upper hole and lower hole for mixed same tone
• 10 hole blues harmonica - 10 holes in a row - blow vs draw to create 20 tones
• 10 hole semi tone (chromatic) harmonica - 10 holes in a row + a leveler - create 20 tones + the semi-tone inbetween

https://www.youtube.com/watch?v=dT7Pkjts7YA
https://www.youtube.com/watch?v=bPsWxPK9304
https://www.youtube.com/watch?v=C4iV_IGOtaw
https://www.google.com.sg/search?q=why+harmonica+bends&source=lnms&tbm=isch&sa=X&ved=0ahUKEwik0IPGsrbLAhVBGY4KHVCTA_MQ_AUIBygB&biw=1164&bih=608
http://www.hoerl.com/Music/harmon5.html
http://www.harmonicaclub.com/lessons/beginners-lesson
http://www.guitarforum.co.za/other-instruments/harmonicaguitar-interaction/
https://www.google.com.sg/search?q=harmonica+types&biw=1162&bih=608&source=lnms&tbm=isch&sa=X&ved=0ahUKEwi6vI3Ut7bLAhUGco4KHT_UCXgQ_AUIBigB
http://www.harmonicaacademy.com/categories/20101027
http://www.harmonica.com/types-of-harmonica-7325.html
http://www.harmonicalessons.com/recommended_def.html
https://en.wikipedia.org/wiki/Harmonica
https://en.wikipedia.org/wiki/Tremolo_harmonica
https://en.wikipedia.org/wiki/Richter-tuned_harmonica
https://www.youtube.com/watch?v=bghOBRA0z-Y
https://www.youtube.com/watch?v=H5Aphh_2PHU
https://en.wikipedia.org/wiki/Chromatic_harmonica
http://thehub.musiciansfriend.com/folk-instrument-buying-guides/harmonica-buying-guide#specialty

• neck holder:
  • 灵韵乐器 GG: (harmonica, erhu, ban, flute)
    • 10孔口琴架24孔口琴架 复音/重音口琴支架可调节 24: https://world.taobao.com/item/530581886677.htm
  • 广州威廉乐器 OO: (guitar, ukulele, violin, celo, guzheng, piano, flue, harmonica, pipe, amp, drum tune, cable)
    • 10孔布鲁斯口琴支架可调节 18: https://world.taobao.com/item/45687969260.htm

• toy type
  • 夏邑忆铭乐器专营店shop swan - 5: https://world.tmall.com/item/12543593167.htm
    • swan 钥匙扣 4.8: https://world.tmall.com/item/12338582885.htm
    • SUZUKI 铃木S-5 五孔十音 12 (soso): https://world.tmall.com/item/13034566277.htm
  • (江阴瑞音乐器) 迷你口琴 4孔8音 (like that quality) - 2.3 : https://world.taobao.com/item/37374745713.htm

• Asia 24 hole harmonic:
  • 夏邑忆铭乐器专营店shop swan 24 -29 :https://world.tmall.com/item/12409655392.htm
    • https://world.tmall.com/item/12337653075.htm
  • 贝音乐器专营店shop swan 24 - 30: https://world.tmall.com/item/536121570310.htm

• 10 hole blues harmonica
  • 夏邑忆铭乐器专营店shop swan - 18: https://world.tmall.com/item/13040720822.htm
  • 贝音乐器专营店shop swan - 25 : https://world.tmall.com/item/535345399081.htm
  • 贝音乐器专营店shop suzuki - 65 : https://world.tmall.com/item/535524528571.htm

• 10 hole semi-tone (chromatic) harmonica
  • 夏邑忆铭乐器专营店shop swan - 78: https://world.tmall.com/item/12394174547.htm
  • 贝音乐器专营店shop swan - 88: https://world.tmall.com/item/536650063120.htm

• 夏邑忆铭乐器 other
  • guitar string 15: https://xyymyq.world.tmall.com/category-408416163.htm
  • guitar pick 1.5: https://xyymyq.world.tmall.com/category-970526792.htm
  • rosin 9: https://world.tmall.com/item/40997072647.htm