Keep your child engaged and motivated to interact.
Case 1: This mom has play power.
Here, the mom and child are making a tower. She has control of the unused blocks and as a result, her child is motivated to interact with her. She can now prompt him to use target behaviors that are listed in his behavior plan. In this case she uses an open ended question and then switches to...
Case 2: This mom does not have play power.
Here, the child has no interest in the blocks and no motivation to interact with the mom. As a result, the mom cannot work on any of the target behaviors listed in the behavior plan.
Case 3: This mom creates play power
If you have lost your child's attention, or you're having trouble getting it in the first place, don't force it. Try to find another activity or a different version of the current activity to get your child's attention back. You may have to be creative.