Final answer:
The children likely didn't feel at home at Cousin Eunice's due to the different rules and the unfamiliar environment, which may have included strict neatness, sharing a room, or outdated toys.
Step-by-step explanation:
The children didn't feel at home at Cousin Eunice's house because her household rules and atmosphere were different from what they were used to at their own home. This discomfort could be due to several reasons not explicitly outlined in the excerpts provided, such as Cousin Eunice's insistence on neatness, the possibility of having to share one room, or feeling out of place amidst old-fashioned toys.
From the provided texts, it is clear that characters experienced unfamiliarity or unease when in a different home environment, whether due to different social customs, levels of comfort, or the feeling of being unconnected to their surroundings. Feelings of alienation and unfamiliarity can seriously affect how at 'home' someone feels, whether they are children or adults.