I made this simple activity by cutting a slit into the lid of a baking soda container. Elise still puts things in her mouth, so I opted for large washers rather than real coins. The satisfying "clink" they make when they land at the bottom of the container is definitely a big point of interest. After all the washers are in the container, Elise usually gives it a shake or two before taking the lid off to retrieve them - an additional fine motor challenge!
I love watching Elise's mind work as she tries to figure out which way to orient the washer to make it fit through the slot. I also kind of envy her casual flexibility - really, who sits like that? ;)