You'll be able to go on lots of rides with your little ones. I first brought my twins to WDW when they were about the same age yours are now. I have very fond memories of riding Small World, Jungle Cruise, Dumbo, and many others with them.
You can take your babies with you on any ride for which there is no height requirement.
If you look at this page of travel tips for people with small children found
HERE,
you will see a button on the right hand side of the page that says
"Height Requirements." Clicking on this link will bring you to handy
pdf that you can download. The pdf lists the attractions in all four
theme parks and both water parks that have height requirements. If an
attraction is not listed on this document it means that there is no
height requirement and any age child can enjoy the ride. This includes all the rides you mentioned and many, many more.
The height requirements are also listed on all the maps at the parks and on signage in front of the various attractions.
Have a great vacation with your family!