I'm 13 and I'm trying to save money HELP!?!?!?

okay so helping people isnt an option (mowing lawns and what not) getting paid for chores...YEA RIGHT! uhmm what else? Oh i cant open a savings accout or certificate of d-something...but I really need money because the school is going to chicago in May (about 5 months) and i want A LOT of spending moollaa...btw ive already save like 40 bucks, srry if this is hard because i cant do those things^ but really if i could, thts all u ppl would say