Originally Posted by budgierock
thanks a lot to answer this question. i was thinking of making it from cardboard like then i can put some soft piece of cloth on and in it.
As you said, if you want to make it just for fun, then it's OK.
Please don't make a nest box of cardboard boxes. Recently a member's chicks died because of it. These are soft and budgies can chew it to pieces. Sometimes it can be toxic as well. Most importantly it will become dirty and soiled very quickly and there is no way to clean these. In a recent case, the cardboard nest box became wet because of rainy and wet weather and it required to be changed. The parents didn't go into the new nest box and abandoned the eggs and the chicks, resulting the chicks to die.