When my kid was five he used to bash around on Volca’s and rip the knobs off my Microkorg while he’d tweaked some insane latched arpeggio sound. Bored after 30 mins.
He’s now nine - he samples his voice into the OP-1 and creates fart and vomiting sounds to speed them up and slow them down because - well that’s what kids really like but… bored after 30 mins.
I gave him an intro to the Digitakt - not interested - did like the flashing lights and how it sounded though.
Bored after 30 mins.
Then one day my Organelle arrived and his eye’s lit up. No he’s not patching in PD haha - but he likes it because it’s weird - and shiny blue - with wooden buttons - with a sneaky little screen. Not bored at all - but it’s MINE!!!
A couple of years back I got him a LittleBits Synth kit because it married two of his favourite worlds in a weird way - making wacky noises and building blocks (Lego = fave thing). He’s totally into connecting things together to create new stuff - the more cables the better. Bored after 30 mins - sent it back.
Recently he has gotten into DJ desks / gear because he can add songs that he likes and rip 'em up… It’s immediate - noisy, flashy, etc… I think this is something a lot of younger kids DO like. I really don’t like all that kind of gear so if he get’s some kind of DJ hardware for Christmas this year it’s going to be a very painful selfless act on my part.
I think if you wanna buy synth / sampler stuff for young kids - you have to admit you’re buying it mostly for yourself.