crawling on hands and knees
手と膝で這う (te to hiza de hau)
"The baby moved on all fours across the floor."
"赤ちゃんは四つん這いで床を動いた。" (akachan wa **yotsunbai** de yuka o ugoita)
a sudden clever idea or solution
showing maturity or wisdom greater than expected for one’s a...
having a very bad memory
to be good at talking or persuading people
honest and straightforward; without cheating
to stay cheerful even when facing difficulties