For those that have children, this technique might work for you.
Some children have trouble urinating immediately once on the toilet in the bathroom. If your children have this problem, there is a simple way to help them along.
Taking your index finger and little (aka pinky) finger, point to two fingers at your child, while the other fingers are folded. Slightly turn your wrist from side to side subtly, giving a rotating motion from left to right. Within a matter of seconds, they will feel the urge to urinate and the wait will be over.
Though there have been no clinical trials on the topic, parents swear to this technique.