This is a bubble machine which came with the little starter bike that we got secondhand for our daughter a few years back. When seeing the bike online, the bubble machine wasn’t attached. Thankfully it was an option to take it off; learning to ride a bike, while bubbles are popping up in front of you sounds like a serious health and safety threat. To keep our daughter happy, we promised her that we’d attach it once she knows how to ride the bike. A useful incentive to get her going quicker. I’d be lying if I said I was disappointed when the bubble machine turned out to be faulty.