Snake and a scorpion if you have read Revelation ;are symbolic . The snake or serpent, is one of Satan's names.( Rev. 12:9 ) It is also a state of moral degradation, to call some one that. (Gen. 3:14 ) No lower can you be.
Scorpions are symbolic in the Book of Revelation for How Satan deceives people in the future ( Rev. 9: ). His mo. Learn how a scorpion takes its pray to understand the meaning in it better.
Instead of thinking you can control snakes. you should have noted that just before Christ said this, he mentions Satan by name. And how that evil spirits were subject to the apostles in Christ name
King James Version (KJV)
18 And he said unto them, I beheld Satan as lightning fall from heaven.
When Christ says your given power over snakes and scorpions, He means power over the wicked one, Satan in His name.( in Christ name ).
( Not that your to literally play with poison animals )
If you ignore what was written just now, to play with snakes Then you would be close to doing what Christ said not to do here :
Satan speaking : 9 And he brought him to Jerusalem, and set him on a pinnacle of the temple, and said unto him, If thou be the Son of God, cast thyself down from hence:
10 For it is written, He shall give his angels charge over thee, to keep thee:
11 And in their hands they shall bear thee up, lest at any time thou dash thy foot against a stone.
Christ speaking : 12 And Jesus answering said unto him, It is said, Thou shalt not tempt the Lord thy God.