I threw away my baby’s new toy snake this morning. I feel a little sorry for his loss, so I took him out to the park after I finished working this afternoon and treated him to his favorite food - noodles. Now he's asked me to buy him a toy tractor. I might escape this by telling him that his mom is going to do some online toy shopping.
Haha, but why did you throw it away? Cute kid! Also, you call him a baby, and maybe he'll always be a baby to you, but normally in English we stop calling children babies after about one and a half to two years.
One more thing is "thus" was correct, but it's too formal a word for this sentence. "So" sounds a lot more natural here.