Prepare some daily necessities like milk, salt, candy, tissue and cola to do the experiments. Also can use tissue and food colouring to test the water absorption of tissue and see the effect of mixing two colors on the tissue. Children can put colour absorption paper into a coloured liquid to see the paper will absorb the color and leave the clear water. And can drop the food colouring into salt water and observe how the liquid changes. The liquid will change when the food colouring put into different concentrations of water. Description: Science experiment lab school kids DIY handmade easy operate smart intelligent cool Stem educational toys ki Product Dimensions: 15.0 x 23.0 x 6.5 cm Package Dimensions: 15.0 x 23.0 x 6.5 cm Weight: 0.2KG Shipping Weight: 0.2KG Recommended Age: Suitable for 6 years & above"