This approach has potential drawbacks, as well. For example, because homes vary greatly across families, it is much more difficult for therapists control, unlike a laboratory or clinic setting. It may also be more difficult to keep children within the room and within the therapist's sight, as the child has more freedom to “escape” if needed. These problems can be avoided by deciding beforehand which room the therapy will take place and by minimizing potential distractions. Availability of resources can be an issue as well, particularly when the treatment requires use of age-appropriate toys that are typically controlled by the therapist in clinical settings. In homes, there may be limited options of activities. However, talking to the parent beforehand about what they might prefer to play with may be helpful, and the therapist can plan to bring the toys needed.