I have an old Logitech USB controller (F310 Gamepad - Console Style - Logitech Gaming) and would like to mess with it and transform it into a toy for my girls. Something like this one from Fisher Price: Fisher Price Baby Gear & Toys | Mattel
Maybe also add some microphone to also record and repeat short audio clips. I've got some old earbuds microphones for that...
Which hardware would you recommend me, one that is simple to interface with an external battery and a small loudspeaker?
Curious to hear your suggestions...