school bus
['parallel bars, bars', 'chain mail, ring mail, mail, chain armor, chain armour, ring armor, ring armour', 'jeep, landrover', 'backpack, back pack, knapsack, packsack, rucksack, haversack', 'notebook, notebook computer', 'dogsled, dog sled, dog sleigh', 'rubber eraser, rubber, pencil eraser']