Is there a tween tampon

No, there are not tween specific tampons - tampons are not recommended to pre-teens or teens given higher risk of TSS and as many younger people may not understand risks or correct use. Most tampon brands with have a Lite absorbency tampon, which is the smallest absorbency available and all brands will be the same absorbency. You use Lite absorbency first and only use higher absorbency if needed.