crawling of a baby with their chest touching the floor

a baby, an infant (human or animal)

赤ちゃん: baby

a transfer / migration

to transfer, to move / to migrate / to enter

room (of a house or hotel), chamber, apartment, flat / (sumo) a stable where rikishi live and train together under a shisho oyakata (stable master)

(dialectal, Kyūshū) sentence-ending particle indicating assertion

媒体: medium

売店: stand or small shop

(Saga) very