Portia has to be on her tummy a lot during the day and it really wears her out. She used to hate it but has been tolerating it a little more now that she can roll over. Zelda as gotten really into it. She loves to shout, 'tummy time!' when I am not paying attention to her and I am holding her little sister. She likes to show me exactly where to put Portia on the rug. I have a feeling that once Portia is more mobile and starts to invade Zelda's space there will be a lot more shouting going on.