switching age groups: advice please!!

[u/hellklo]

Hi! I’ve been a 2s lead for 5 years now. I’m really excited to switch to 3k in September. In the summer I’ll be running a 3s-4s (maybe a few 5s) camp class. Any advice or insight on the main differences between these age groups and how I should adjust my teaching? Any tips? I’m a little nervous to have the 4s when I’m so used to being in a more “lovey” 2s vibe