you need to think of an activity that YOU would like - that they can do too - there is nothing worse than trying to be nice to your kids whilst doing something you detest ( in my case cooking - just kill me and have done!)
i like drawing - i have an "art bag" bits of crepe paper glue etc.
fruits of labout ar easily cellotaped to kitchen door
even at 13 - they get a kick out of it.
try making with them a certificate for the greatest brother int he world they have to think of a nice thing and them make a certificate.
poems are good too.
at 9 & 7 i used to make mine give each other a kiss and a love and say sorry - thye hated it
routine is key i find. - my house is shithole - i am no mother earthy type person and my routine has to shift depending on life.
however planout the evenign when they get home from school - so mon = craft night
tue = bake a cake night ( puke)
wed = board game
etc.
i used to always make them get changed when they got home
make them hang uniform up
make them get out homework and complete it with me sitting there with a brew with spare pens on hand
then they can have something small to eat like a butty or toast - because they have dinner hours before and low sugar levels make them grumpy
then you can do your together time
then they can help you tidy it up
then they can watch telly
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you need to get your head in a good place.
good punishments for mine were making them do maths - you can get them off the internet. - more school work after being at school is so pants.
another tip
dont carry ont he punishments for a long time - short shap shock - ps2 banned for one night
my dh always goes overboard with " your never seeing daylight again!!" well thats clearly unreasonable.
and look after yourself