Fingernail Polish

My daughter Becca is driving me crazy with her new favorite hobby, painting her fingernails and her toenails. Normally this wouldn't be a problem, however her two year old sister feels the need to do the same things as Becca. I now have to worry about where this fingernail polish is going to end up. On the sofa, table, clothes, or any other household item. Needless to say it is no fun finding spots of fingernail polish through out the house.