my kids are 8, 5, and 3. the 2 younger ones still have training wheels. how long or far is it okay for them to ride? they are not happy being tugged around and want to ride themselves. i would love to start riding long distance again but know they can't handle it yet, well maybe my 8 year old idk. do you take your kids out on paved trails on their bikes or stick to riding around the neighborhood? how would training wheels react to dirt, gravel trails? at what age can they start building up endurance to ride longer? i want to do more than the endless circle around the houses but don't want to get stuck halfway out on a trail and have to walk the bikes and kids back lol. it's pretty flat so how far out would you go before turning back? is it dangerous for children to ride too far or be pushed a bit to go on instead of giving up? thanks!