Welcome to The Problem Solver Play Kit for months 43-45
Your 3-year-old loves to compare, organize, sort, and categorize—it’s their way of making sense of the world. When they were younger, they may have called all four-legged animals “dog” and anything circular “ball.” At age 3, their categorizations are getting more sophisticated, and they are likely beginning to notice differences in people.
Your child also may be starting to recognize numbers, patterns, sequences, and shapes. You can tell them that, just like stories and letters, math and numbers are all around them. Before, they may have recited numbers in order without knowing what each one signified. Now, they are beginning to understand that each number represents a quantity that can be counted.
The playthings, books, and learning toys in The Problem Solver Play Kit support your 3-year-old’s desire to categorize, and the increasingly complex way they understand the world and their place in it. Use these educational tools to invite your child to measure, count, mix colors, learn about people, take turns, and more.
The Problem Solver is accompanied, as always, by our Play Guide. It contains all our research, some helpful tips to keep in mind as you navigate new changes, and more at-home activity ideas.
What’s Inside
The Problem Solver Play Kit
![Turtle Hatch Game](https://i0.wp.com/lovevery-blog.com/wp-content/uploads/2022/04/Kit17_TurtleGame-ISO.png?resize=300%2C300&ssl=1)
Turtle Hatch Game
Practice taking turns with a fun and collaborative board game
Montessori Math Bars & Number Tiles
Build math fundamentals visually with concrete objects to count, line up, and compare
![Montessori Math Bars & Number Tiles](https://i0.wp.com/lovevery-blog.com/wp-content/uploads/2022/04/Kit17_MathBars2-ISO.png?resize=300%2C300&ssl=1)
![Number Sense Nature Counters](https://i0.wp.com/lovevery-blog.com/wp-content/uploads/2022/04/Kit17_NatureCounters-ISO.png?resize=300%2C300&ssl=1)
Number Sense Nature Counters
Learn to count with 55 counters in 10 animal and nature characters
Size It Up Measuring Tape
Made just for them with a soft pull tab, push bottom, and exposure to both cm and in
![](https://i0.wp.com/lovevery-blog.com/wp-content/uploads/2023/07/Kit17-SizeItUpMeasuringTape-ISO_v2_web.webp?resize=1024%2C1024&ssl=1)
![Wooden Wobble Puzzle](https://i0.wp.com/lovevery-blog.com/wp-content/uploads/2022/04/Kit17_WobblePuzzle-ISO.png?resize=300%2C300&ssl=1)
Wooden Wobble Puzzle
Solve a STEM puzzle in three dimensions
Liquid Color Lab
Experiment with self-directed color blending with 6 test tubes, 2 water droppers, a bamboo towel set, and plenty of color tablets
![Liquid Color Lab](https://i0.wp.com/lovevery-blog.com/wp-content/uploads/2022/04/Kit17_Liquidcolorlab-ISO_c2c4b80e-b399-4a7e-ac89-1384a288dc47.png?resize=300%2C300&ssl=1)
![‘Uncle Rob's Pizza Party' Book](https://i0.wp.com/lovevery-blog.com/wp-content/uploads/2022/04/Kit17_MediumPaperBook-ISO.png?resize=300%2C300&ssl=1)
‘Uncle Rob’s Pizza Party’ Book
A story featuring a loved one with a disability to help your child understand differences
Get Started Guide
Visual instructions for the Montessori Math Bars & Number Tiles and Number Sense Nature Counters for your independent 3-year-old
![Get Started Guide](https://i0.wp.com/lovevery-blog.com/wp-content/uploads/2022/04/Kit17_GettingStarted-ISO.png?resize=300%2C300&ssl=1)
![Play Guide for Months 43, 44, 45](https://i0.wp.com/lovevery-blog.com/wp-content/uploads/2022/04/Kit_17_Playguide-ISO_US.png?resize=1024%2C1024&ssl=1)
Play Guide for Months 43, 44, 45
Ways to play, expert tips, development information, and at-home activity ideas during months 43, 44, and 45
Add the Book Bundle
to The Problem Solver Play Kit
Easy to add to your current Play Kit Subscription
or to a new Play Kit Subscription
‘Measurement Day’ Hardcover Book
This is a story about conflict resolution and compromise as a brother and sister argue over a measuring tape found in the toy bin.
‘You Decide’ Hardcover Book
Children are learning that the decisions they make now can affect what happens next. This choose-your-own-path book helps your child make the connection between a choice and its consequence.
Learn about Book Bundles, more Lovevery stories for, and inspired by, your growing child.
![The Problem Solver](https://i0.wp.com/lovevery-blog.com/wp-content/uploads/2021/07/Lovevery-VKS-Playkit-3YO-TheProblemSolver-ISO-357-April2021_web_gray.webp?fit=300%2C225&ssl=1)
The Problem Solver Play Kit
Your 3-year-old is naturally curious and wants to experiment with everything. The Problem Solver focuses on collaboration and STEM activities, measurement, color mixing, categorizing, and more.
Learn morePosted in: 43 - 45 Months, Language, Math, Cognitive Development, Product Recommendations
Keep reading
![Book Bundles from Lovevery](https://i0.wp.com/lovevery-blog.com/wp-content/uploads/2022/05/2023_04_21_playgym_ls_1673_bh_v2_web.jpeg?fit=768%2C512&ssl=1)
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Inspire an early love of reading with Lovevery Book Bundles
Lovevery is thrilled to announce its new Book Bundles for Play Kits subscribers. We’re excited for you and your child to discover your new favorite books together.
![Toddler looking at a Lovevery book](https://i0.wp.com/lovevery-blog.com/wp-content/uploads/2021/07/2021_03_02_blog1386-Edit.jpg?fit=768%2C455&ssl=1)
37 - 39 Months
3-year-old
What do you do when your 3-year-old stops napping?
It can be hard for both you and your child when they drop their last nap. Here are some ways to make the transition easier for everyone.
![Montessori playshelf filled with Lovevery toys](https://i0.wp.com/lovevery-blog.com/wp-content/uploads/2021/07/7G7A2185-2-Edit.20210624214610415-e1628171629245.jpg?fit=768%2C455&ssl=1)
13 - 15 Months
Rotating toys the Montessori way = better, deeper play
Learn how the minimalist Montessori approach to toy rotation—just a few objects at a time, rotated every few weeks—benefits your toddler.