Would a pack of seeds be good for my first grader to give to his friends on the last day?

Its okay, its just sort of... random. I think a lollipop, no note, would be more appropriate, random notes on why you like people isnt exactly an expected thing and the other kids could think him a bit odd for it. Also, unless you are giving them to the whole class, do not give them to him to give to his friends at school, wait until after school. Kids that age get their feelings hurt very easily, and if he goes around passing out gifts and candy to some kids and not others, you will get a dozen kids with feelings hurt and "why does he get one and I dont, Im not your friend?", parents calling you complaining on why their little Johnny didnt get something that others did, and one annoyed teacher who has to deal with all the whining and tears.