means the Danish-made interlocking plastic building bricks that snap together into anything a child (or adult) can imagine.

from From the Danish phrase 'leg godt,' meaning 'play well,' coined in the 1930s by the company's founder Ole Kirk Christiansen as a name for his toy firm. There's a happy coincidence often pointed out: in Latin 'lego' can mean 'I put together' or 'I assemble' — but this is almost certainly an afterthought, not the source. The Danish playfulness came first.