This craft kit contains everything you need to assemble a model of a robotic arm that uses hydraulic power to open and close its hand. Children will receive a basic introduction to the scientific principles of hydraulics. It includes an instruction booklet and the relevant components. Mostly made of cardboard. Dimensions approximately L 60 cm × W 11 cm × H 3.5 cm when fully assembled. Recommended for children aged 8 and up. Requires scissors (not included). Packaged in a printed cardboard box. Warning: Not suitable for children under 3 years. Choking hazard due to small parts. Please read all instructions and warnings carefully before assembling the arm. Some metal parts may have sharp edges, so adult supervision is required during assembly and use of the arm. Materials: glue, cardboard, foam, metal, stickers, plastic, rubber. Product dimensions: Width: 11 cm, Length: 60 cm, Height: 3.5 cm, Weight: 34 g. Packaged product dimensions: Width: 16.5 cm, Length: 5.5 cm, Height: 21.5 cm, Weight: 121 g.