A child's flow is a powerful force, like the traffic on a highway.
When you want your child to change to a new flow, such as leaving a playground or getting ready for bed, it helps to "merge" with his or her flow first. You can avoid a "collision" if you slow down and check out your child's "traffic conditions" before attempting to merge. Just wait until you feel an opening, then go.
Once you're flowing together, it's a lot easier to shift to a new flow.