There have been issues with Homeowners Associations (HOAs) having an issue with this creative outlet for a child. If your neighborhood has an HOA, it might be advisable to check to ensure this would be acceptable. Some may not have a problem with this while others will not only have a problem with the sidewalk outside your home but even your own driveway if it is painted with chalk paint. If this is the case, there are other avenues, for example, letting a child have a piece of the backyard patio to explore their creative outlet. Another idea is to designate an area of the garage for the child to draw their pictures.