Keilim 17:14-15

Keilim 17:14

The laws of ritual impurity can apply to things that were created on the first day but not to things that were created on the second day; to things that were created on the third day but not to things that were created on the fourth and fifth days except for an osprey’s feather and a plated ostrich egg. Rabbi Yochanan ben Nuri said there’s no difference between an osprey’s feather and those of other birds. The laws of ritual impurity apply to everything that was created on the sixth day.

Keilim 17:15

If one made a receptacle of whatever size, it is susceptible to ritual impurity. If he made something to sit or recline on in any way, it is susceptible to impurity. If one made a pouch from untanned hide or papyrus, it is susceptible to impurity. If children hollowed out a pomegranate, an acorn or a nut to measure dust or to make a toy scale, it is susceptible to ritual impurity. This is because, when it comes to children, actions are meaningful even though intentions aren’t.