Megiddo on 20 August 2018
In Japan at least, 35% of the active Switch users in May were under 14. It's pretty much on par with 3DS which had 35% of active users under 14. Compare this with the PS4 which had 7.5% of active users under 14 in May.
Source: https://www.resetera.com/threads/demographics-for-consoles-pc-smartphones-in-japan-may-2018.52871/
