I received these cases with speakers for kids. The case is fantastic, very well made and Amazon's basic bluetooth speakers fit in really well.
Perfeo Sound Ranger SV922 Gold Radio
38 Review
JBL Flip 5 Waterproof Portable Wireless Bluetooth Speaker Bundle With 2-Port USB Wall Charger - Blue
103 Review
JBL GO 2 Portable Waterproof Speaker in Champagne: Take Your Music Anywhere!
101 Review
Renewed JBL Go 2 Portable Bluetooth Speaker in Blue: Enjoy Music On-the-Go
62 Review
KEiiD Bluetooth Stereo Shelf System With Retro CD Player, Speakers, FM Radio Receiver, USB, AUX, Bass/Treble EQ, Wooden CD Music Bookshelf System For Home Audio
28 Review
KEiiD Wooden Retro CD Player With Bluetooth, FM Radio, USB AUX Inputs, Speakers And Adjustable Bass/Treble For Home Stereo System And Boombox
27 Review
SINGING WOOD Boombox Portable Bluetooth
9 Review
Gamepad GEN GAME X3 Bluetooth, black/red
23 Review