Review title is Arrives hopelessly tangled [SEP] The balls come hopelessly tangled and have remained that way despite me spending hours trying to get them apart.  One stiff neck and upper back later and I’m ready to return this.  Yes, it’s cheap, but you get what you pay for.  I was hoping to stimulate some physics lessons with the kids.  Instead I’ve just stimulated my frustration.  I’ll try again tomorrow, but if no success, it’s going to be returned.