Depends how young and respective physical capability.
We settled out on a CZ Scout for my daughter, but she was 9, tall for age, and able to handle the weight. I started her on air rifles at 6, and we stuck with that until she could handle a nicer youth rifle. She still shoots air and recently started with our local club focused on ISSF 10m.
Nothing inherently wrong with a rascal, cricket, etc, but they look cheap, feel cheap, and are cheap. But then air is less expensive again, teaches the same fundamentals, and is possibly more accessible depending on locals laws and your living situation.
Best advice I received when I asked a similar question was to involve my daughter in the process and listen to her input. Keeping them interested is the primary goal when they’re young, and letting them have input goes a long way.
Have fun!