OP, although there does seem to be some risk involved, a good conversation with your kids may be in order
There are many dangerous things in life and your kids need to learn how to avoid them.
Maybe instituting a simple 'all clear?' Before closing the doors will prevent accidents.
Whenever I'm working with a jack/quickjack/car lift, before lowering the car I ask 'all clear?' And I don't lower it until everyone near the car answers all clear.
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