It can be a great option to use an E-Bike for towing if your E-Bike is compatible for use with a Bike Trailer (see above). It will remove any of the barriers around the capability of the lead rider. One of the challenges especially as your child grows is the weight you will be towing. This can affect your ability to tow for very long or to maintain good balance and therefore a steady, straight riding line. An E-Bike gives you added power and the ability to cover greater distances.
As always be aware of your safety… E-Bikes give you the ability to travel at a much faster speed than you would achieve under your own power. What does this mean when towing a child? While it might not be an issue while going up a hill, what does it mean on the flat or braking when coming down a hill? If this is how you will tow your child we recommend you spend longer in the practice/safe environment when you first get set up, going over balance, cornering at a greater speed and stopping distances.