The world of principles

Leap 9

Around 59 weeks, you may see signs of the next leap: leap 9. Welcome to the world of principles. If your toddler has taken the leap, you will notice that they are running all kinds of “programs” more smoothly, more naturally and more clearly. You suddenly understand better what they are doing or what they mean. Principles influence their thinking! Learn everything you need to know about leap 9 in The Wonder Weeks app.

The fussy phase of leap 9

The fussy phase of leap 9

You will notice between 59 and 65 weeks after the dure date that your toddler is more inclined to cry, cling and be more cranky than usual. That’s because their whole world has changed again. Leap 9 has started! Did you know that you can find countless other signals in our app to help you recognize the fussy phase of a leap?

The skills phase of leap 9

The skills phase of leap 9

Around 64 weeks, your toddler will be a bit used to their new world and the journey of discovery can begin. Leap 9 is the leap of principles. Your toddler is more adept at handling the world of programs. As a result, they can not only imitate programs better, but also change them and create them by themselves. As a result, your little one will learn to think ahead, to reflect, to consider the consequences of their actions, to make plans and to balance them against each other.

The skills of leap 9

How long does leap 9 last?

For most toddlers, the fussy phase of leap 9 lasts five weeks, but can also take one or six weeks. Characteristic of leap 9 is that your little bundle of joy can be rather irritable, impatient, frustrated or angry. For example, if your are not immediately available, if something does not go their way, or if you take something away from them or forbid it.

Mental leap 9: choices and imitations

Your toddler will increasingly start to thing in terms of strategies: “Should I rather ask Mom or Dad for a candy?” Of course, they cannot yet carry out their plans as skillfully, as naturally or as complexly as we do, because we have been able to practice for years. Slowly but surely they will find their own way into the complicated world of principles. They are beginning to understand more and more how programs work and are also able to go through and follow them more smoothly.

Your toddler will think up some strategies by themselves or imitate others flawlessly. So mind your own behavior around them during this time, because before you know it, your child will imitate you all day long!


Your baby’s unique journey of development

It’s important to keep in mind that every baby is unique. Some babies tend to focus more on displaying their physical abilities, while others show a stronger inclination towards developing their speech and language skills. Babies will decide for themselves what they want to prioritize at any given moment.
Did you know that our app not only allows you to track the specific skills associated with each leap, but it also provides you with helpful videos with information and instructions to guide you along the way. This can help you better understand your baby’s unique developmental journey.

Baby leap chart

During our research into mental leaps, we discovered that this phase in which your baby cries more frequently and shows a different behavior than normally, can actually be predicted quite accurately almost up to the very week based on the due date. Discover the leaps of your baby on our website, using our baby leap chart.

More about leaps
Leap 1
From week 4, your baby enters leap 1, the world of sensations. The first signals of your baby’s first leap will appear between weeks 4 to 6 after the due date.
More about leap 1
Leap 2
From week 7, your baby enters leap 2: the world of patterns. Your baby could show the first signals of leap 2 between week 7 to week 10 after the due date.
More about leap 2
Leap 3
Around 11 weeks, you may see signs of the next leap approaching: leap 3, the world of smooth transitions. Your baby is acquiring yet another new skill!
More about leap 3
Leap 4
From week 14, leap 4 starts! The first signals of leap 4 will appear between weeks 14 to 20 after the due date. During leap 3, your baby learned to see several smooth transitions, patterns, or sensations without seeing any connection.
More about leap 4
Leap 5
From 22 weeks, your baby enters the world of relationships. Welcome to leap 5! Leap 5 is no small leap. This is a giant leap! Why? This leap enables your baby to perceive the relationships between all the earlier leaps.
More about leap 5
Leap 6
From week 33, the world of categories will be knocking at your door, leap 6. The first signals of leap 6 will appear during weeks 33 to 38. Once your baby can perceive “categories”, they will realize that they can divide the world into groups.
More about leap 6
Leap 7
Around 41 weeks, the world of sequences is just around the corner. Welcome to leap 7! Between 41 and 47 leap 7 will start. While your baby mainly studied things by taking or tearing them apart during the previous leap, they will now be rather “constructive” after this leap.
More about leap 7
Leap 8
Hip, hip, hooray! During this leap, your baby will celebrate its first birthday. Your baby will not only make a leap in their mental development but will also turn form a baby into a toddler!
More about leap 8
Leap 9
Around 59 weeks, you may see signs of the next leap: leap 9. Welcome to the world of principles. If your toddler has taken the leap, you will notice that they are running all kinds of “programs” more smoothly, more naturally and more clearly.
More about leap 9
Leap 10
Around 70 weeks, your toddler is ready for a new leap into the world of systems: leap 10. The last leap, at least the last one we have recorded. In leap 10, you can now observe your toddler becoming aware of systems after making this leap!
More about leap 10