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Think Wittsy’s Colour-Changing Bath Book: Discovering What Water Can Do

Updated Sep 2026

Think Wittsy’s Colour-Changing Bath Book: Discovering What Water Can Do

Bath time has two people in it with completely different objectives. The adult wants a child washed, dried and into bed within twenty minutes. The child wants to stay in the water and has no interest at all in the schedule. Most bath toys are bought to close that gap. Something floats, something squirts, and the child is occupied long enough for the soap to happen.

That is a reasonable thing to buy. It is also a small ambition for ten minutes in which a baby is fully absorbed, hands free, and allowed to make a mess with a material and watch what it does.

The Think Wittsy colour changing bath book is built around that second idea. Water touches the page and colour appears. The page dries and the colour goes back. It is waterproof, chew-safe and made for babies from six months onwards, and the most interesting thing about it is not the colour arriving. It is that the colour leaves again.

This article looks at why a colour changing bath book does something a floating duck cannot, what a baby is actually working on while they soak and squeeze it, and how to use it without turning bath time into a lesson.

The bath is the only laboratory a baby is allowed to use

Babies run experiments constantly. The spoon goes over the side of the high chair. The cup gets tipped until the water reaches the edge. The same action is repeated ten times while the child watches whether the result holds. Adults read this as naughtiness or a phase. It is closer to data collection.

The difficulty is that almost every one of those experiments gets stopped. The spill is wiped, the spoon is confiscated, the cup is moved out of reach. The child simply loses the experiment.

The bath is the exception. Everything is already wet, nothing is at risk, and the floor was going to need a mop regardless. It is the one part of the day where an adult will cheerfully let a small child do the same thing forty times in a row. Whatever you put in that water is handed an unusual amount of attention.

What the colour changing bath book actually does

The set is deliberately plain. The book itself, a soft sponge for cleaning play, and a fish-shaped hanger so it can drip dry. No batteries, no app, nothing to charge. Each piece does something different in a child’s hands.

Water reveals, drying resets

Most cause and effect a baby meets in the first year runs in one direction only. A dropped glass does not reassemble. Spilt juice does not climb back into the cup. The child produces an effect once, and the evidence is then cleared away by somebody else.

The colour changing bath book gives them a loop instead of an event. They can run it, watch it, wait, and run it again. Repetition is how a conclusion actually forms at this age, and the reset is what makes the repetition possible.

There is a quieter shift that follows. The first few times, the colour is a surprise. After enough turns, the child starts watching for it before it arrives. Expecting a result is a different mental act from receiving one, and it is the beginning of prediction.

Squeezing, wiping and turning wet pages

The soft sponge is there for cleaning play, and it is harder work than it looks. Gripping a soaked sponge, squeezing until the water runs out and letting go again asks a small hand to do three separate things in sequence.

Turning a wet page is harder than turning a dry one. The pages stick slightly, fingers slip, and the child has to adjust. That resistance is useful. It is the difference between an object that responds to a swipe and one that asks to be handled properly.

The fish-shaped hanger sounds like storage, and it is, but drying is part of the mechanic rather than an afterthought. The colour changing bath book has to dry before it can work again. Hanging it up is the reset button, and toddlers are perfectly capable of understanding that.

A story about getting clean

The book carries a simple story about staying clean, which is a more sensible route than instruction. Persuading a toddler to accept a wash is usually a negotiation, and negotiating from inside the bathroom rarely goes well.

A story moves the behaviour somewhere else first. The child watches it happen to somebody in the book before it happens to them, which is a gentler entry than being told to sit still. It will not end every protest about hair washing, but it gives the routine a shape the child recognises rather than a rule they have to obey.

What changes between six months and two years

At six months, the colour changing bath book is mostly mouthed, gripped and slapped against the water. This is why chew-safe and BPA-free materials matter more than any feature on the list. The colour is something that happens nearby.

A few months later the same child starts doing it deliberately, dipping a page to see the change and then looking up to check that an adult saw it too. That look is the point. Discovery at this age is social before it is scientific.

By two, language arrives. They name the colour, tell you what is about to happen, and get slightly smug when they are right. One object, three quite different activities, spread across eighteen months rather than one week. As always, a baby near water needs constant supervision, whatever they are holding.

How to use it without turning it into a lesson

A few small habits keep it interesting for longer.

  • Let the child work it out before you explain it. The discovery loses something the moment it becomes your announcement.
  • Describe what happened rather than what it means. It went blue is better than see how water changes colour.
  • Hang it on the fish hanger somewhere the child can see it drying, so the reset stays visible.
  • Use it outside the bath too. A bowl of water and the sponge on a hot afternoon buys you twenty quiet minutes.

Collection Spotlight: Baby’s first colour changing book

The Think Wittsy colour changing bath book is made for babies and toddlers from six months, travels well, hangs up to dry, and survives being chewed, which is a fair summary of what a first book actually has to do. When the same child reaches eighteen months, Splash-n-see carries the water-reveals-colour idea into a magnetic fishing game with six colour-changing fish.

Final thought

A rubber duck floats. That is the whole of it, and the child works that out on day one. Babies do not need to be entertained in the bath. They need something that answers back the same way every time, and lets them ask again.

Bring home the Think Wittsy colour changing bath book and let your baby find out what water can do.

 

Shraddha Fogla
Founder | Think Wittsy

Think Wittsy is the brainchild of our founder, Shraddha Fogla, who believes learning has no age and everything can be taught to kids in a simplified, fun and engaging manner.

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