≤4hamusement park equipment,amusement park trains(electric train/ diesel train/ trackless train/ track train),thrill rides(flying tower/roller coaster/ferris wheel/flying chair/pirate ship/Top Spin/Big Pendulum),kids rides/family rides(carousel/self-control plane/tea cup/flying car/samba balloon etc),bumper cars(battery bumper car/ electric bumper car/antenna bumper car)