I'm going to let classmates get excluded from an activity
Why would you let them be excluded?
They don't seem to take my jokes seriously
It's wrong to exclude people from things on purpose. You should try to talk to them and help them.
It is good that they don't get to do cool things like us. They can learn car maintenance on their own.
It is rude that you aren't giving them the same opportunities. You should see if they want to be involved. You shouldn't be petty for no reason.