Nicely done @Margaret Langston! You have good control of your edges here: the blobs on the left are clearly longer and flatter, and the blobs on the right are more spherical. You are also very consistent with your light sources. Since theres so much overlap, especially in the first image, I think cast shadows would really help sell the forms and be good practice for you with sharp edges that fade into firm and soft edges. Where the cast shadow originates it will be small and sharp, and will become gradually softer and broader as it falls around the form.

These are really good blobs!

So cute:-)

I love the wireframe where you've mapped out your volumes! These are looking like really well connected 3d forms. Great work! Your observations are dead on, the second blob looks more dimensional and with greater volume than the first, but you're missing some of the reflected light definition. In the first, your reflected light is very close in value to your dark half tone, but once you darkened the reflected light to it's proper value, your darkest darks and core shadows disappeared. This is the balancing act! Value is relative so it always helps to revisit and redefine your darkest darks/lightest lights throughout the shading process. Increasing the value of the core shadow will help reveal form, and the reflected light will start to become visible again. Once you've reestablished the darkest darks, and lightest lights, you can begin to balance that across the other forms as they fall away from the light source. Keep up the good work, hope this helps!