No, hatching eggs is definitely not too hard, even for newbies!
The first time I hatched eggs, I had only ever owned one chicken and ended up building my incubator from scratch. It was really fun and exciting, and great for the entire family. My little sister (in elementary school at the time) also hatched eggs for her science fair project with very little help from me, so it can be done! As long as you have patience; 21 days can sometimes seem like forever.
All you need is an incubator, a candler (or a flashlight), water (for humidity), maybe a thermometer (if the incubator doesn't have one built in), and most importantly, eggs! When you're buying the Dominique hatching eggs, make sure they're fresh and, this is optional, but you can crack one open to test for fertility (fertile egg yolks will have a "target"-like white shape on them).
Also, if you buy a good incubator (I eventually bought a HovaBator), you really won't need to do much work at all. Just check the temperature a lot to make sure it's not fluctuating too much and refill water when humidity is getting low. And remember to turn the eggs three (or any odd number higher than that) times a day. These are the three basic rules of thumb.
For more info. and help, I would recommend this websites; they helped me out a lot when I first started incubating:
http://www.howtoincubate.com/
http://www.mypetchicken.com/hatching-eggs/guide-toc.aspx
http://shilala.homestead.com/incubating.html
Ultimately, the experience of hatching out chickens yourself is an unforgettable one! It really gives you a new found appreciation of nature and I'm sure your 2-year-old will enjoy it greatly.
Lots of luck!