lever, screw, ramp, wheel and axle, light bulb, doorknob, slide, ramp, ramp, wedge, seesaw, wheel and axle, ramp, wedge, light bulb, doorknob, screw, lever, wheel and axle, axe

Gaya visual

Tampilkan semua

Pengaturan aktivitas

Papan Peringkat

Berganti templat

Pulihkan simpan otomatis: ?