If you like 'big' rides then make sure you use child swap (unless your children are very tall). One of you goes on the usual queue (or Fastpass if you have it) and asks the Cast Member for a child swap, they will give you another ticket for your partner to go on without queueing.
When you go you will have Legends of the Force happening in the Studios and Pirates and Princesses in DLP. Sadly I haven't seen either but have heard very good things, especially regarding P&P. I understand the parade changes direction or something each time so maybe someone that's seen could explain what to watch out for.
With regards to rides, I have a 3 year old and our favourite ride (that isn't currently being refurbished) it's Pirates of the Caribbean, can be a little scary (very dark boat ride) but she loves it. Casey Jr at the back of Fantasyland is great for young children and, if they are over 1.02m then Big Thunder Mountain is a perfect first 'big girl' roller-coaster, as my daughter refers to it.
The Studios may be a bit sparse due to refurbishment and, if you don't like Star Wars, you may struggle to find much to do. However, I personally love the Studios and would still go in for the rides on the right (Toy Story Playland, Ratatouille and Carpets) and the stunt show at the back left. There are also meet and greets at Toon Studios but make sure you download the Lineberty app to book your character meets.
And Mickey and The Magician is not to be missed, also in the Studios.
After you've knackered yourself out, head for Rainforest Cafe in Disney Village. It does have mixed reviews but is another favourite of my daughters, and when in Disney, she's the boss.