S.S.
My 21 mth old son is just now getting used to using a spoon. I tried to introduce it earlier and he just couldn't get used to it. He ended up learning to use a fork first and still prefers the fork over the spoon. You can either stop, wait a while, and then introduce it again or give it to him at every meal and let him decide if he wants to use it. Try introducing a fork, he might like it.