Dive into fun math practice with this creative ocean-themed activity! Children practise numbers 0-20, addition, and subtraction while coloring by code to reveal a hidden picture. When finished, they fold their work into a shell-shaped craft that opens to show a colorful surprise inside. A perfect combination of math, creativity, and hands-on learning. What’s included (6 designs with increasing difficulty) Match numbers 1–10 Match numbers 11–20 Addition (answers within 1–10) Addition (answers