If you happen to take a trip to Seremban with your family, take your kids to the bicycle park. It has got road signs, traffic lights and a round-a-bout. Kids can learn to obey traffic rules. You don't need to bring your own bicycles (although you can), they have bicycles for rent there. But whether you use your own bicycle or theirs, the rate is RM2 for 1/2 hour.
It is a lot of fun for the kids. Good way to get rid of that extra energy of theirs.
And for those little ones who can't ride a bike yet? There's always the horse. Hehehehe. Yeah, there's a playground outside and inside the park. Actually, I've seen some parents rent those little tricycles for toddlers. They attach a rope to the tricycle and pull their little kid around. If you're looking for some exercise, that could be a good idea.
The park is located near the lake gardens. Weekdays it is opened from 5pm-7pm. Weekends and holidays are 8am - 7pm.