It's a little wooden whale.
Love the illustrated bits. Made by Ben Floeter in his etsy shop Suddenly It's Real.
Also appreciatin' the overall cleverness of this:
It's a little chalkboard (the sleeve is painted with chalkboard paint) shaped like an arm. Love the little red string on the finer, and the graphic styling of the hand and of course the chalk holder atop. Also available at Suddenly It's Real.