How much spending money should a 14 year old take to spain for 2 week?

As much as you can reasonably afford. Prices are just the same as at home.

Bring 200 - 300 (watever currency you use) cause in Spain there is loads of shops like Zara, Mango and H&M so you might see something you likee yourself x :)

i would say abt 10 pounds a day is plenty even to buy gifts to bring back. that should also cover things like entrance fees to certain entertainment places like bowling or theme parks.spain is cheap but with that amount they won,t feel left behind their friends

Kind of depends on how much you want to buy. I would expect a minimum of $20 a day. That will let you buy a couple a treats every day and a few shirts or other things during the trip. If you want to shop and buy a lot of souvenirs, I would put it more in $40 a day range for free days. If you have events planned, you are probably going to need less money on those days.

200 bones