How many toddlers does it take to paint a house. It depends on how hard you throw them
That joke made me very uncomfortable.  Is that what you think of small kids?
Yes, they are just like paint. They are not real people and can be dealt with in any way you want
Children are absolutely people and you should not joke about harming them. Toddlers are very vulnerable and subject to abuse every day and you should not joke about that.