The other night, Twin2 was standing in front of a full-length mirror, grinning impishly as he looked at himself in the mirror.
He’d exhale and push his tummy outwards and say, “BIIIG tummy!”
He’d then inhale and attempt to make his tummy as small as possible while saying, “Small tummy.”
He did this several times, laughing at himself. Then, realising that we were watching him and laughing at his antics, he sheepishly grinned and stopped :)