Anything you'd add to this short 4 day itinerary? Family's first trip to LA.

Hello everyone. I posted here a month or so ago asking for advice for our family's upcoming vacation to LA. Thanks to all who chimed in! We are flying in this Friday and ended up booking a hotel in Santa Monica. Here is what I have planned so far. Does anyone have any suggestions or advice on anything we should add, or change, or not miss while we are there? For the record, I know people will suggest renting a car and I just don't want to. I drive all the time and when on vacation I prefer not to. Plus I figured by the time we pay for the car, insurance, and parking, using Uber may not be that much more expensive.
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Day 1: The plane lands at LAX in the morning. Uber to the hotel in Santa Monica. Check in early if possible, if not, leave bags with bell staff. Day 1 is just exploring Santa Monica, the Pier, 3rd Street Promenade, and possibly walking to Venice Beach and back.

Day 2: We have tickets to the Nutcracker at the Dolby. Doors at 1 pm - get to the area a little early to do a little sightseeing. Spy the Hollywood sign from somewhere. After the ballet, walk about 20 minutes (or Uber) to Funko Hollywood so the kids can pick out a couple of new Funkos.

Day 3: We have tickets for a Warner Brothers Studio Tour. After that Uber to Griffith Observatory, stay for Sunset, Uber home.

Day 4: This is the only day we don't have something planned. This was the one day I was considering renting a car and driving up the PCH to Point Dume and I had been planning on exploring the Santa Monica Mountains area before the wildfire. Now, I think it may be best to stay out of that area.

Any other ideas or suggestions on what to do on that final day would be most appreciated. Thanks in advance and see you soon!