Arrange train carriages according to numbers on their sides. The numbers are represented in a range of formats such as words, numerals, dice dots or counting frames. Identify the numbers that come before and after starting numbers. Begin with numbers up to ten. Move on to work with larger numbers such as 40 and 50. Practise 'skip counting' by twos, fives and tens. For example, 'skip count' by five to arrange four carriages into the order 12, 17, 22, 27. This learning object is a combination of five objects that progressively increase in difficulty.