If you are looking for digital patterns or printable activities:

: While not named "Stella Baby," research involving infant emotional reactions (like the Toddler Still-Face paradigm ) is often cited in developmental psychology.

There is a specific brand called that is often associated with baby-safe tactile play:

: You can find Postpartum Nurse Report Sheets that help track mother and baby care in clinical settings. Research Studies If you are looking for an academic paper: