The Number Crew is designed to support and inspire mathematics teaching for 5 to 7 year olds, supporting the development of numeracy and mathematics through 3-D and 2-D animation, story and song. Part 1 is aimed at 5 to 6 year olds, and Part 2 at 6 to 7 year olds, providing some continuity and progression. This episode contains two parts: 15. The Trouble With Crocodiles - Adding a pair of single digit numbers, crossing the 10 boundary and 16. Double Trouble - Knowing doubles of numbers 1 to 5 and learning doubles of 6 to 10.