Most kids (and dads) in your race are using graphite. Most of the kids in my Cub Scout pack sure do. It’s cheap, you can get it anywhere, and it feels very slippery.
I use an industrial lube called Dry Moly film. It looks a lot like the powdered graphite you buy at the hardware or hobby store, but it’s about twice as slippery. It’s hard to find in smaller quanities — I bought a pound twenty years ago and I’m still using it. The kids in my pack all gather around and ask what I’m brushing onto my wheels. I always tell them it’s magic pixie dust.
You can also get a graphite-moly blend. A place called Hodges Hobby House has made and sold this for almost thirty years and it’s almost as slick as dry moly.
One thing I’m trying this year is to coat my wheels and axles with teflon before I put them on and lube them. If you try this, make sure the teflon spray you use is designed to penetrate the surface and then dry completely out. If your local hardware store doesn’t have this, you might try this spray from Amazon.