It is interesting to note the similarity in visual composition between this short and the Lumiere Brothers' Swimming in the Sea (Baignade en mer, 1895). They use the same oblique angle here, only this time it is slightly more complex, being suggested by the tidal pool (and subsequently the children traipsing up and down looking for clams), the two pairs of adults standing along one side of the tidal pool, and the mountains. As in Swimming in the Sea, the oblique exaggerates perspective, providing great depth of field, which is further enhanced by the aerial perspective of the mountains in the distance. This technique appears continually in the Lumiere Brothers actualities.
Another recurrent compositional technique is the Lumiere Brothers' fondness for cyclical action, provided in Children Digging for Clams by the titular youngsters. The action is made even more complex here by the donkey cart and the layering--there are at least four layers of visual interest, counting the mountains, five if we count the expanse of sand between the second layer of adults and the scattered people in the distance.
Unlike many actualities, this short gives a charming, "homey" feeling for the era, putting the viewer right in the middle of this recreational outing. You wish you could pick up a net and participate.