Hubelino Marble Run: Seesaw Filler Set The seesaw is our largest expansion component. When the marble has enough speed, it will roll straight into the seesaw and then continue with increasing speed. And because you can never have enough seesaws, this set includes two of them, as well as track elements, building blocks, a base plate and marbles. Specifications: Colour: multicolour Gender: junior Material: ABS Package dimensions: 28.4 x 14.6 x 11 cm (L x W x H) Suitable for children aged 4 and up. Contents: 2 Seesaws 19 Track elements 20 Construction elements 2 Marbles 2 Base plates