Children's bedtime stories that end in unsolved problems. The protagonist retreats into their thinking corner determined to solve the problem that stands in the way of a prospective happy ending.
Create a series of books for different age groups. The stories and complexity of problems should be tailored to the age. As the age increases, so should the length of the stories and the complexity of the main problem. Stories for 2-5-year-olds are short and simple.
In each story, the main character is on a mission. S/he encounters various problems on the way. In the attempt to idenitfy the root of the problem and understand it well, s/he thinks out loud, consults other characters. A few problems are relatively easy to solve and are dealt with quickly.
Then the character runs into a bigger problem that requires more effort. S/he goes on a side-quest to:
build the necessary skills
research and learn the necessary knowledge
find and partner with characters that have the necessary skill for the challenge
The bigger problem is eventually solved successfully.
Then with a happy end in sight, the character encounters one final problem. S/he takes it as a challenge and decides to solve it with great determination. S/he goes to think about it into their special thinking place (shower, forest walk, work desk, etc). Describe the thinking place and why it works well for the character. The protagonist struggles comming up with a solution for a long time and finally decides to take a rest. S/he come up with a plan on how s/he will jump start their cretivity after the break. The story ends here.