材质：ABS、塑料。尺寸：39×23×7cm。内含55个螺母和10个螺栓。标有数字1-10的螺母，配对相应数量的螺栓，帮助幼儿学习1-10的数量对应。通过将螺栓螺母进行拧扣，提升幼儿动手能力。
Boost early patterning skills—with nuts and bolts kids can’t wait to get their hands on! Children just choose bolts and twist on brightly colored nuts to create patterns…building fine motor skills as they go! The molded plastic nuts and bolts feature a quick-release design that makes it a cinch to remove the nuts and start again! Set includes 6 bolts and 60 nuts; bolts measure 6 3/4" in length.
