Allowing children to participate in the celebration of Halloween may appear to be quite harmless on the surface, but the spiritual implications are far from Christian. In today's world, fortune-telling, Ouija boards, ESP, telepathy, horoscopes, voodoo, clairvoyance, yoga, hypnosis, magic, transcendental meditation, Eastern religions, reincarnation, metaphysics and many other practices are expressly forbidden in Scripture. They are related to the occult and satanic forces. Therefore believers should have nothing to do with them.
Leviticus 19:31 Regard not them that have familiar spirits, neither seek after wizards, to be defiled by them: I am the LORD your God.
Deuteronomy 18:10 There shall not be found among you any one that maketh his son or his daughter to pass through the fire, or that useth divination, or an observer of times, or an enchanter, or a witch, 11 Or a charmer, or a consulter with familiar spirits, or a wizard, or a necromancer.
Ephesians 5:8 For ye were sometimes darkness, but now are ye light in the Lord: walk as children of light: 9 (For the fruit of the Spirit is in all goodness and righteousness and truth;) 10 Proving what is acceptable unto the Lord. 11 And have no fellowship with the unfruitful works of darkness, but rather reprove them.