Lap bars on Ferris Wheels and lap ropes on kiddie trains aren't considered restraints at all. Solid metal lap bars only fit closely against the largest passenger in the car, often leaving young children with room to slide around. If a lap bar doesn't fit closely, a fast-moving ride can cause a child to slip completely out from underneath the bar. Loose-fitting lap bars also allow young children to stand up on their own while a ride is moving. Remember, there are no mandatory federal standards for the design of amusement rides.
Amusement rides are neither childproof nor childsafe.
Use good judgement when deciding whether your kids should ride. Obey minimum height, age, and weight restrictions. Never sneak children onto rides they're too small or too young for. Ride manufacturers' restrictions take into account the forces exerted by the ride and the intellectual maturity required to ride safely. Kids who are tall for their age may not be developmentally ready for a particular ride.