There are also some simple phrases parents use that convey easy messages like "use your words". I try to translate it, to "utilise tes mots", but it sounds a bit awkward and unnatural. I also like the saying "it hurts my feelings", the translation for this would be "ca me fait de la peine" but I think the French expression is a lot more abstract (it literally means "it pains me").
Finally, I think the English language can easily be put into simple phrases you can repeat over and over. I have heard A's teacher say to a child who was upset about the sticker she got "you get what you get and you don't get upset", I think that it's a great way to put it, and that there is no way you could do that in French. Maybe it's because I don't live in France and have lost some of my skills, but I feel that French requires you to explain things in more complex ways.
Don't get me wrong, I love the French language, and its complexity is what makes it particularly interesting, but when it comes to toddlers, the English language may have an advantage. Maybe a linguist could actually study the issue.