Mathe-Duo: Plus & Mal Lernset

This set includes two learning boards, PLUS1 for addition and subtraction up to 20, and MAL1 for learning multiplication, designed for children learning basic math skills. It comes with a money-back guarantee if no progress is made within two weeks of daily practice.

• The description claims that users will see measurable progress in just two weeks with daily five-minute practice.
• The description claims a 100% satisfaction guarantee, offering a refund if no progress is made.
• The boards are made from untreated birch wood and handmade in Germany by workshops for people with disabilities.