I agree with the previous posters. Flexi-rods will do the trick.
Use a setting lotion or leave in that does not leave your hair stiff or weighed down. Don't spiral down the rod too much, if at all. I would use them like regular rollers, but I have more control with the rods. If you roll over instead of under, your hair will appear with loose waves and curls. Sally's recently started to stock 2 larger size flexi rods. Remember don't be too heavy handed with the products, so your hair can be bouncy and fluffy.
I hope I explained this properly.