[Pre-orders Begin] Colors Change with Transparent Stickers! Gakken's New Sensory Educational Toy 'Clear Seal Puzzle' to be Released in July

Gakken Inc. (Tokyo, Shinagawa / Representative Director and President: Tatsuya Nanjo), a group company of Gakken Holdings Co., Ltd. (Tokyo, Shinagawa / Representative Director and President: Hiroaki Miyahara), began pre-orders on May 11, 2026, for 'Atama ga Yoku Naru! Clear Seal Puzzle: Sukete, Kasanete, Iro ga Kawaru!' (scheduled for release on July 9, 2026).

New Educational Puzzle Drawing Attention for Summer Vacation

"Looking for new educational activities that parents and children can enjoy together during summer vacation." "Want teaching materials that naturally foster an appreciation for colors and art."

In response to such voices, Gakken introduces a new sensory sticker puzzle.

Enjoy 'Mixed Color Art' by Layering Transparent Stickers

The biggest feature of this book is the ability to enjoy color changes by layering transparent stickers.

Each time multiple stickers are layered, the colors change, and the process of completion itself leads to 'learning' and 'discovery'!

▲ Complex color tones emerge depending on the layered colors and patterns...

5 Points to Know Before Pre-ordering

・Fun color changes with transparent stickers ・Create 11 works with 858 stickers ・Personalize your work by choosing colors ・Don't worry if it's a little misaligned, it still looks beautiful ・Designed for ages 4 to adult

[Product Overview]

'Atama ga Yoku Naru! Clear Seal Puzzle: Sukete, Kasanete, Iro ga Kawaru!'

Price: 1,760 yen (tax included)

Scheduled Release Date: July 9, 2026

Format: 230×230mm・48 pages

ISBN: 978-4-05-206272-8

Digital Edition: None

Publisher: Gakken Inc.

Gakken Publishing Website: https://hon.gakken.jp/book/1020627200

[Click here to pre-order/purchase this book]

・Amazon: https://www.amazon.co.jp/dp/4052062728/

・Rakuten Books: https://books.rakuten.co.jp/rb/18626040/

Gakken Inc.

https://www.corp-gakken.co.jp/ ・Representative Director and President: Tatsuya Nanjo ・Date of Establishment: January 13, 2009 (Trade name changed October 1, 2022) ・Capital: 50 million yen ・Address: 2-11-8 Nishi-Gotanda, Shinagawa-ku, Tokyo 141-8416 ・Business Activities: Publishing and content business, global business, medical and nursing publishing content business, kindergarten and school business, classroom-related business, EC and online business, advertising business.

GAKKEN HOLDINGS CO., LTD.

https://www.gakken.co.jp/ ・Representative Director and President: Hiroaki Miyahara ・Date of Establishment: March 31, 1947 ・Capital: 19,817 million yen ・Sales: 199.1 billion yen, Consolidated subsidiaries: 82 companies (as of September 2025) ・Listed: Tokyo Stock Exchange Prime Market (Securities Code: 9470) ・Address: 2-11-8 Nishi-Gotanda, Shinagawa-ku, Tokyo 141-8510 ・Phone Number: 03-6431-1001 (main) ・Business Activities: A holding company founded in 1946, operating in education and medical/welfare related businesses. Education sector: Classroom and cram school businesses including "Gakken Classroom," publishing and content businesses for learning materials, kindergarten and school businesses for textbooks and childcare supplies, etc. Medical and welfare sector: Service-oriented senior housing business, dementia group home business, childcare support businesses such as nurseries and after-school care, etc. Global: Operations and business development in over 150 countries.