T.T.
About the allowance: My kids NEVER got an allowance. They did however get to sleep in a bed, watch cable for "free" and have food in their bellies.
I also do not give extra points for keeping the room clean (cause I simply bag their stuff up and give it to the homeless if they need me to do it) and I never gave them money for helping keep THEIR house clean.
I will say this tho, if they did exceptionally well in school, if they did what they were told, if they went out of their way to help, I made sure they got extra.
And they never went without a prom dress, dance dress, cheer uniform, art supplies, gas money, lego set, etc when I could afford it either.
But this is coming from a single mom for most of their life so I imagine the situation is different for those that have the extra income. I simply did not.
I just think there's something to be said for doing something because it's the right thing to do...a selfless act...rather than always thinking you have to get paid for it.
I like the be nice to your brother, pick up toys, etc. Those are all good things to teach the wee ones early.
Good luck to you.