It's practically impossible to legally sell them, most of the components won't pass testing as they were never intended to be used by children for playI know this was a while ago (long time lurker) but going back to the busy board that she'd bought off someone on Instagram... I looked into making these a couple of years ago and to legally sell them in the UK, they need to be fully CE tested. Anything that has "play value" does. Long story short, it would have cost thousands to have done it so that was the end of that. I'm still yet to find anyone that is legally selling them - as far as I can see, the one she bought isn't CE tested! I hope it's safe .