Cuisenaire rods and found driftwood, a nice combo.

Cuisenaire rods are mathematics learning aids for students that provide an enactive, hands-on way to explore mathematics and learn mathematical concepts, such as the four basic arithmetical operations, working with fractions and finding divisors. In the early 1950s, Caleb Gattegno popularised this set of coloured number rods created by the Belgian primary school teacher Georges Cuisenaire (1891–1975), who called the rods réglettes. According to Gattegno, “Georges Cuisenaire showed in the early fifties that students who had been taught traditionally, and were rated ‘weak’, took huge strides when they shifted to using the material. They became ‘very good’ at traditional arithmetic when they were allowed to manipulate the rods.

I never liked mathematics, this is my way of transforming mathematics into something I do like.