Just fill the box with soil, add seeds (e.g. beans) or worms (from the compost) and - most importantly - darken it with the light protective cover. Only in the dark the roots and tunnels of the worms will reach to the inner plastic wall. The protective cover should only be removed for the purpose of observation. Contents: plastic box, lid with air holes, light-protective cover out of cardboard, bases. Caution. Not suitable for children under 36 months. Danger of suffocation due to small components.