This is a mechanical that will expand as twisted as shown in the giff above. It is recomended to sand the bottom of each expanding part which is the smallest part, this is the only part that uses suports and remember to remove the all the supports.

To asseble the model take the base and each of the covers, these are the smallest parts, take the covers and insert them into each hole in the base all the way. Next take the spiral and set it on top of the base and all of the covers you may have to spin the spiral a bit to get each of the little clips on the coversthen you just spin.