From Waipa (the only place to start for Under 10s) take Tahi on the right, and follow all the way to the skid site.
If they are feeling great, take the Creek Track to Bakers Hollow - don't take the right at the top that is a marked XXXX. From Bakers Hollow head into Tahi for a bit, then jump onto The Dipper. Follow The Dipper to the end, through the berms and back to the road by the seat. From there, go straight ahead on to Tahi towards Pohaturoa Rd. Turn left here and head home to Waipa. Watch for oncoming traffic.
The trail usually takes around 90 minutes, and that's including numerous stops when necessary. It's best to take a map incase you end up lost.