Numbers 1 to 20 Match Up Self Correcting Puzzles Numerals Words

Because the teens are the hard part. 'Eleven' and 'twelve' tell a child nothing, and 'thirteen' says the digits backwards. A set that stops at ten skips the difficult bit.

Each piece only mates with the right partner. A wrong guess does not physically go together, so the child finds out immediately without an adult checking.

Twenty numbers at two pieces each is 40 pieces, so that is how we read it. The supplier's wording says '40 self-correcting puzzles' and we have asked them to be plain about it.

The numeral (7), the number word (seven), and a pictured group of that many things. Joining those three is what number sense actually is.

No age is published. Number work to twenty usually sits across Prep and Year 1.

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