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.
Then comes 6-12 months where: Babies babble and enjoy vocal play as they experiment with a range of sounds. At 12-18 months is when: Toddlers begin to use sound in a meaningful way. They say one-syllable words, make sounds like cars and planes, and say things like, uh oh..