Sorting out thoughts for Tot School

After 2 tot books, I was stuck for a while and did not know which theme I should continue.
Wanted to follow the book I have at home and the theme 'blue' but i lacked sufficient resources.

Went to the library looking for 'blue' books but ended up with books on bugs.
Thus my new topic would be bugs.

After pondering for a while, I decided.

Tot books should only be for specific ideas like my first 2 books "ants, caterpillar".
Activities can be of a general theme such as bugs.
That could be easier to work on.