What exercises help to tone up the body?

Sit-ups.

Crunches, but I especially like bicycle crunches. They are the best for toning abs.

Crunches and sit-ups are the way to tone your abs,but you should do exercises for your entire body as “spot-toning” is a waste of time.Along with exercise,following a good diet will get you there alot quicker.
Good luck :)

I don’t know, i think that diet is a huge part and there is that saying 90% diet 10% exercise but only if u have the money and food to support an intense diet like that. I suggest going to Scoobysworkshop.com and trying that out. That conditioned me for track, and it provides foods u will like and can buy at ur average store, but it asks how much exercise you get a day because exercise is the most cost efficient way but certainly not the easiest. Oh and ya bicycle crunches r the boss of ab workouts.