“Hidden Sum” Wooden Rotating Maths Puzzle – Logic Brain Teaser (18 cm / 25 cm, 7+)

Description

A maths challenge: find the hidden sum

This rotating wooden puzzle was made for curious minds. The rule is simple, but the solution takes strategy: turn the rings and look for the arrangement in which every column has the same sum. An engaging maths game that builds concentration and logical thinking.

What does it develop?

• logical thinking and pattern spotting;
• number sense and quick mental addition;
• patience, systematic checking and strategy;
• it also works brilliantly as brain training for adults.

Who is it for?

• Children (7+) and teenagers, as an educational toy.
• Teachers, as a resource for the classroom or a maths club.
• Home learning and Montessori-style activities.
• Adults looking for a mental challenge.
• Creative use in escape rooms and challenge activities.

18 cm or 25 cm?

• 18 cm – compact, handy for personal use, travel or as a gift.
• 25 cm – larger, with numbers that are easier to see; ideal for learning spaces, classrooms, team solving or escape rooms.

Specification

✅ Three-layer wooden puzzle (2 rotating rings + base).
✅ Material: durable, high-quality birch plywood.
✅ 2 sizes: 18 cm and 25 cm in diameter.
✅ Coated with a child-safe protective finish.
✅ Recommended: ages 7+ (also for adults).

Each item is made from natural birch plywood and finished by hand, so the wood grain and shade may vary slightly from the photos – every piece is unique.

Want a tougher challenge? Try our “Hidden Product” puzzles:
Level 1: “Hidden Product” Level 1
Level 2: “Hidden Product” Level 2
Level 3: “Hidden Product” Level 3

✔ Made in Lithuania.
✔ CE marked – safe for children, compliant with EU safety standards.