A portable speaker is great for your trip and that's what you get with this Bluetooth speaker from Lexibook. This model uses Bluetooth for easy pairing with other devices.
From Amazon
Lexibook Harry Potter Speaker, Luminous figurine, 5.0 Bluetooth,USB/USB Type C port, BTD80PA
Currys
LEXIBOOK BTD80PA Portable Bluetooth Speaker - Paw Patrol, Yellow,Brown,Gold