I'm so so so pleased with what I got in Poundland yesterday!
Sponge ball curlers - 4 in a pack, I got 2 packs so 8 in total - they are so so good for £2!
I put them in whilst my hair was damp and left them overnight. When I took them out this morning I had soft, loose waves that I've never been able to achieve with heated rollers or straighteners or curling wands.
I'm seriously pleased with these - definitely worth trying, cheap as chips, no heat damage 