1.All the items are made of steel.
2.No clue are needed. You may need some simple tools for help,such as long nose pliers and scissors.
3.There are some small parts,so the work of assembly needs patience and carefulness.There is detailed instructions for each item,which you should followed step by step.
4.Do not fold the delicate parts repeatedly.The sheets are very thin,so it may be out of shape or break after you fold it several times.
5.During or after the assembly,the edges or points of some parts may cut,so be careful about that.The products are NOT recommended for children under 14. Parents' guide is necessary for children.