Hi! Normally you use a ball in your tub. During the Sinterklaas period, you can also buy bubbly letters at the Etos. Now I wanted to test the letter during this period, but the lockdown didn't keep our weekend away. So now... I finally got to test it. The Etos Bad Bruisletter - Citrus Swirl consists of a scent of forest berries, moss, musk and patchouli. So it smells great! As you can see in the video, the letter is buzzing very nicely. The water smells great, only all colours disappear quickly. I regretted that. Would I buy this one more time? Yeah, because it's a lot of fun and smells good. No, because the colours disappear quickly. Can you recommend me another spittball? X