You will need Very light wire net Artificial pine branches Medium size Christmas balls of different colours and covered with artificial velvet Groups of 12 little Christmas balls (6 glossy and 6 dull) in different colours: gold, silver, blue and red Christmas ribbons with different colours and decorations Battery-operated fairy lights

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We bought all the materials (except the ribbons and wire net) in the IKEA shop near our town in Christmas season.

At first you have to choose where you want to place this Christmas decoration. Buy the wire net keeping in mind you have to fold up the net many times; multiply your dimension by four. Model the wire net according to your fancy but remember to give it some volume.
Place the fairy lights inside (battery boxes included). Be careful to be able to switch on and off the lights easily every time you want.
Place the pine branches in order to hide the wires and battery boxes.
Choose ribbons of different colours to combine them very well with your little and medium size Christmas balls. You can also use old Christmas ribbons. Pass a ribbon through the hooks of all the little balls with the same colour. At this point pull the two ends and tie them: all the little balls will join up into an only sphere. Place the sphere on the wire net using the same ribbon; tie the two ends in a bow. Use all the little Christmas balls making more spheres.
Arrange the velvet balls in different points of the net using little ribbons.
Look at the photo for more details; if you zoom the photo you can enlarge the image.