How long does it take for a teen to tone his arms

I just got 2 25 pound dumbells for each hand and I'm doing 35 bicep curls daily for about a week but no tone is showing up

hmmm, well, I need to tone my arms for softball, so I go to the weightroom 2 or 3 times a week and do a lot of arms, so like google arm exercises, because I dont think 35 bicep curls will do much, more exercises=more results, haha I sound so cheezy=P

Your biceps are a very small muscle... try working out every muscle in your body.
Do squats and lunges for legs and glutes, bench presses for your shoulders and chest, pull-ups for your back and biceps, sit-ups for your abs. By bulding more muscle throughout your body, you will lose fat even during rest, which will tone up your muscles.