You can take toddlers to community lots with a mod.
Yes, I know the one, but it's badly bugged and tends to break things in game in my experience. It's disabled my sims' ability to call taxies and such - and that was in a very lightly modded game. I now also use the Bus Transport system from Chris Hatch, and I'm almost positive the Puppy/Kitten/Toddler riders mod would interfere with that, not to mention the Inteen globals.
I feel like a simple transporter would accomplish the same things without the potential for chaos that enabling car access would have.