I just found out that little one really LOVES helium filled ballons. And it's quite calming and soothing because it moves so slowly. Not to speak about the color.
We bought ours at
Ballon Express in Zurich. If the gas flattens, they fill it up for free.
Medium sized shiny version stays ok the longest.
As new parents sometimes the unexpected provides the most help, so I thought of sharing the idea as we have many soon to be mummies.