just make sure they dont watch you type in your password to your online spending wallet.
Really nice idea Or they can just wash dishes or maybe help you with other stuff for money and you will pay to them with bitcoin. I think you will be a good father/mother
The only issue I can see is if Bitcoin moves in a downward trend and they see their allowance diminish in value, but it's a good way to give them exposure to the wild world of investments.
What would a kid spend bitcoin on? Assuming (s)he's not strung out/into gambling yet?
Or are kids expected to simply save their allowance nowadays?
https://vimeo.com/110611531