Remove the tank cover and check the water level after the fill valve has shut off. It should be about one inch below the opening of the overflow tube. If it is significantly lower than that, there may not be enough water in the tank to fill the bowl after a flush. Correct this by adjusting the float.
The average child can do this during the second half of this year. Between 24-36 months, children are typically able to work simple insert puzzles (e.g., completes a three-piece simple puzzle where pieces are whole objects). Also, children can remove a part from a toy (e.g., a wheel) and replace it.
The babbling will start making sense as your child will begin imitating your language. He or she should also respond to sounds by eye contact and turning his or her head in the direction of sounds. By the end of 18 months, your child will continue to learn new words. However, do not expect too much though. Most children say up to 10 words by the age of 18 months although they understand the meaning of much more words and will point to a familiar object or person when named.