We're taking our just turned 3 year old grandson in January too! (Again!) I took he, his mom, and my 80 year old MIL (her first trip) when GS was 18 months. We skipped DHS. Really didn't have too much for our group. My purpose was to treat GS and MIL and cater to their interests! He loved EPCOT! Enjoyed it thoroughly! He loved AK as well! That was a half day for us! We did two days at MK. Took him back last year with just his Grumps and I at 2 1/2 years old and he loved the same things! Now though, DHS has Toy Story Land, so that changes things. We added another day! Enjoy your trip, I thought nothing could be better than taking your kids to WDW but what did I know! Even Grumps who isn't a big fan is so excited to go again with GS!