Measure It teaches young children how measuring works, step by step. A cute caterpillar, crayon or train lies on a mat next to a green start line. Tap Koala's basket and smiling blocks hop out and line up underneath, counting as they land, until they reach the end: three blocks long! Next, the blocks are already lined up and children count them and tap the number. Then they compare two things to find the longer or shorter one, and measure with paper clips instead of blocks. Last comes a centimetre ruler. The 0 glows to show that measuring starts at zero, and later the ruler sits in the wrong place until a tap slides its 0 to the start. Each stage visits a new place and wins a new ruler.