It’s never been a problem here. They only do it with the buckets. And then because mom drops off, and dad picks up...they both have bases buckled into their cars. I’m putting big hooks on the wall outside to hang backpacks on for school aged kids, I could put up a couple of bike brackets too for car seats.
. The entry is through the carport so it’s covered.
Currently, the baby buckets go on the shelf under my coffee table.