Hoppers are intended to provide an energetic work out and will enhance a young persons body co-ordination and balance skill. Manufactured from the strong, yet soft, vinyl material for long lasting use and durability. A great exercise product for indoors or a smooth safe outdoor surface. Avaialble in 3 size; Dia. 45cm (yellow, up to 6 years), 55cm (red, up to 9 years) and 66cm (blue, 9 years +).